Changes In Reflectance Research Articles

Deterioration of White Tempera Mock-Ups Paints in a SO2-Rich Atmosphere

Historical tempera paints exposed to pollutant gases suffer chemical and mineralogical deterioration which manifests through physical changes. Knowledge about these changes is fundamental to develop strategies for preventive conservation of wall paintings. In this research, binary tempera mock-ups composed of calcite, gypsum or lead white mixed with a proteinaceous binder (i.e., egg yolk or rabbit glue) were exposed to an aging test by using SO2-rich atmosphere exposure to learn about the degradation mechanisms and forms related to the pigment–binder interaction. Reference (unaltered) and aged mock-ups were studied from a physical point of view, characterizing the morphological changes by using stereomicroscopy and profilometry, color variations by using spectrophotometry, gloss changes, and reflectance changes by using a hyperspectral camera. Also, mineralogical and chemical changes were studied by means of X-ray diffraction, Fourier transform infrared spectroscopy and scanning electron microscopy with energy-dispersive X-ray spectroscopy. Egg-yolk-based paints showed higher chromatic changes than their counterparts made of rabbit glue binder. Also, sulfate and sulfite salts precipitated on the surface of the aged paints regardless of their binder, influencing the painting reflectance which subsequently increased. Egg-yolk-based mock-ups exhibited roughness increases while the rabbit-glue-based paints showed roughness reduction, with the exception of lead-white-based paints. Therefore, the important influence of the type of binder and the interaction between the binder and the pigment on the durability of tempera paints in atmospheres rich in SO2 was confirmed.

A 12-months randomized clinical trial comparing fluoride-based remineralising protocols on post-orthodontic initial caries lesions.

To compare the long-term remineralization of initial caries lesion (ICL) treated with different remineralizing agents during orthodontic retention using optical coherence tomography (OCT). This randomised clinical trial recruited 30 patients on fixed appliances with at least one ICL labially on any maxillary incisor. At debond (baseline), they were allocated to three groups, where twice daily fluoride toothpaste was given: (1) as control; (2) supplemented with daily casein phosphopeptide amorphous calcium phosphate with fluoride (CPP-ACPF); or (3) supplemented with three-monthly professional applied fluoride varnish (FV). Primary outcome was the OCT backscatter reflectance changes of the ICL, measured as integrated reflectivity (IR). Follow-ups were at three-month intervals up to 12months. The trial was registered with Clinicaltrials.gov (NCT04788550). Analyses included 26 participants (nine control; nine CPP-ACPF; eight FV). There were significant reduction in integrated reflectivity over time. Post hoc comparisons showed reductions were significant up to 150-micron depth at 6-months, and up to 250-micron depth at both 9- and 12-months follow-up compared to baseline. At 12-months, FV had the lowest IR values, followed by CPP-ACPF and control, but the differences between groups were not significant. After 12-months observation, use of fluoridated toothpaste alone or supplemented with either fluoride varnish or CPP-ACPF promotes enamel remineralization up to 250-micron depth. Daily fluoridated toothpaste with regular 3-monthly recall visits from the start of orthodontic retention is recommended for effective control of initial caries lesions. FV and CPP-ACPF supplementation can be considered but their long-term benefits remain inconclusive.

Change in reflectance of silicon wafer with different micro-patterned surface fabricated using fiber laser

Laser-patterned surfaces functioned as antireflecting surfaces, which minimized reflection loss for a crystallized silicon wafer. Four different microstructures, namely, micro-channel, micro-hole, grid, and hybrid patterns were fabricated using the fiber laser. The patterned wafers were characterized for the wavelength range of 300–1,100 nm. The hybrid structure exhibited the lowest average reflectance of 0.33, followed by the micro hole (0.36) and the micro-channel (0.4) for the 300–1,100-nm wavelength using a Jasco V-770 spectrophotometer (Japan Spectroscopic Company (JASCO), Japan). Patterned surfaces can trap a large amount of light in solar panels, which is beneficial for photovoltaic and optical applications by cutting down the reflection losses. Surface morphology analysis was performed using a field emission scanning electron microscope (SEM). SEM images showed an amplified view of structure where the irregularity of surfaces (micro cracks, ripples, pits, etc.) can be seen.

3D reconstruction of a highly reflective surface based on multi-view fusion and point cloud fitting with a structured light field

In this paper, a three-dimensional (3D) reconstruction method based on multi-view fusion and point cloud fitting is proposed to accurately reconstruct the highly reflective surface, which can effectively restore the highlight regions with only a single shot. A multi-view image fusion method based on the characteristics of microlens array cameras is used to remove unsaturated highlights. A new adaptive method, to our knowledge, based on binary images is designed to quickly extract the highlight regions. Then, what we believe to be a novel B-spline point cloud repair algorithm is proposed to construct geometric features for the highlight regions, and the weighted least squares plane fitting method based on priority is utilized to remove the saturated highlight point by point. More importantly, the 3D reconstruction system based on a structured light field is set up independently to verify the feasibility and effectiveness of the proposed method. The experimental results show that the proposed method can effectively achieve 3D reconstruction with large reflectivity changes and large highlight areas, and its repaired rate can reach 98.44%. Consequently, the proposed method can fully restore all highlight regions and can uniformly, accurately, and smoothly recover different highly reflective surfaces while avoiding hardware complexity.

Ultra-fast terahertz optical switch based on Metal vanadium dioxide

Abstract In current research, the reflection and absorption characteristics of optical switches in optical systems are often limited by the material's response speed and tunable range. We propose a novel metal grating structure with phase-change material to overcome these limitations. This paper proposes a tunable ultrafast terahertz optical switch based on vanadium dioxide (VO₂), composed of a VO₂ layer, a dielectric layer, and metal, with the VO₂ layer located on top of the plasmonic (Au) thin film. The optical performance variations in different states are revealed by analyzing the absorption rate, electric field distribution, and light absorption time of VO₂ before and after phase transition. VO2 exhibits a promising phase transition for actively controlling terahertz waves, with the insulator-to-metal transition used to switch the coupling between surface plasmon modes and normally incident electromagnetic waves on and off. These optical switches enable ultrafast switching, as the VO2 phase transition occurs on the femtosecond timescale. Experimental results indicate that the absorber demonstrates near-perfect absorption peaks, achieving absorption rates as high as 99.99%. The absorption efficiency modulation depth before and after the phase transition can reach 99.92%, allowing the absorber to achieve tunability. The reflectivity of VO2 is about -0.38 dB before the phase transition, and it significantly increases to -23.3 dB after the transition, with a switching ratio of 22.92 dB. This significant reflectivity change is attributed to the VO₂ phase transition, leading it to reflect light signals at high temperatures, preventing their transmission. The electric field diagrams and light absorption time analysis further support this conclusion, demonstrating that VO₂ material can efficiently switch optical signals by modulating temperature. This research offers new approaches for developing high-performance, fast-response terahertz optical switches, with potential applications in future optical communication and signal processing.

Electrochromic Fabric Device Based on Lamellar Polyaniline through Inkjet Printing.

Flexible electrochromic devices (FECD) have been widely applied in smart displays, wearable devices, and other fields, however, the synchronous improvement of electrochromic performance and flexibility is still a challenge. In this paper, a fabric-based FECD with "side-by-side" structure is designed and constructed through inkjet printing. The polyaniline nanosheets with good dispersion are used as ink and electrochromic material, and the self-developed semi-solid electrolyte based on polyvinyl alcohol serves as gel electrolyte. Benefiting from the improved structure and excellent performance of individual components, the obtained FECD achieves a reflectivity change of 22.9%, and maintains the electrochromic ability after bending for 1000 times. This shows the potential in the field of wearable smart clothing and other flexible textile displays.

“It isn’t the same for everyone”: Early childhood educators’ lived experiences with cultivating social inclusion

ABSTRACT Children with disabilities are less likely than their peers without disabilities to exercise their rights to education and participation in their communities. Early childhood educators play a crucial role in ensuring that all children are included in daily activities and interactions to foster children’s wellbeing. However, educators receive minimal training on fostering social inclusion in early childhood settings. The purpose of this phenomenological study was to explore thirty-seven early childhood education professionals’ experiences and perceptions of cultivating social inclusion in the context of a training program called Building Friendships. The program involved participation in a series of training workshops aimed at fostering play and friendships in diverse and inclusive child care settings. Interviews were conducted to explore participants’ perceptions and experiences with social inclusion before and after training workshops. Educators delineated a range of issues pertaining to the quality of social inclusion, and additional training appeared to serve as a catalyst for reflection and practice changes which improved the social experiences of children with disabilities in their care. This study underscores the diverse understandings and experiences of educators with regards to social inclusion and benefits associated with providing opportunities for professional development which can promote best practices.

The use of vertical gradients of radar reflectivity factor and radial velocity to diagnose dynamical and microphysical structures in extratropical cyclones: results from IMPACTS

Abstract The Investigation of Microphysics and Precipitation for Atlantic Coast-Threatening Snowstorms field campaign comprised three deployments in January and February of 2020, 2022, and 2023. Throughout these deployments, the NASA Earth Resources-2 (ER-2) aircraft conducted 26 research flights, equipped with three vertically pointing radars. These radars sampled the vertical structure of extratropical cyclone clouds at four distinct radar wavelengths, enabling a finer scale analysis of reflectivity and radial velocity structures within extratropical cyclones with a vertical sampling resolution of 26.5 m. In this analysis, we introduce a novel technique utilizing vertical gradients in radial velocity and reflectivity, which proved effective in identifying turbulence, waves, and layers of ascent over 132.5 m layers for all flight legs conducted during the campaign. The spatial scale of 132.5 m was chosen to capture fine-scale variations associated with small-scale turbulent eddies and shear zones in frontal regions. The gradient analysis aided in detecting small scale changes in reflectivity and radial velocity that might have gone unnoticed otherwise. Moreover, the corresponding gradients in reflectivity suggest potential interactions of falling ice crystals with turbulence, waves, and shear layers, possibly influencing the microphysical characteristics and the vertical spatial distribution of falling snow. The observed vertical gradients in radial velocity often exhibited linear, layered patterns, but in some instances displayed wave-like appearances, sloped patterns along frontal boundaries, or magnitude fluctuations. This paper focuses on presenting and detailing the vertical gradient technique to examine winter storms. Future work will involve a comprehensive analysis of these gradients in relation to dual-frequency radar measurements and in situ microphysical characteristics.

Temperature measurements of metal-free GaN using a thermoreflectance-based approach depending on excitation wavelength

Abstract This study provides a precise and reproducible methodology of measuring the surface temperature of GaN devices without metal deposition, based on thermoreflectance (TR) properties. Two TR techniques are proposed, tailored to the reflectance properties of GaN devices. The first method measures the surface temperature by monitoring changes in reflectance using light with an energy above the bandgap, while the second method monitors changes in the fringe pattern of the reflectance spectrum using light with a sub-bandgap energy of GaN. Both methods can measure equally accurate surface temperatures across a wide range of temperature by improving the magnitude and nonlinearity of the temperature-dependent reflectance through appropriate selections of incident light wavelengths. This research is expected to be applicable for non-contact and non-destructive measurement of local temperatures in high-power electronic and optoelectronic devices based on GaN across a wide temperature range.

Biodegradable RF Metamaterial Perfect Absorber for Wireless Soil pH Monitoring

AbstractA wireless soil pH sensor is proposed using a sheet‐type perfect absorber metamaterial. The sensor utilizes a high‐impedance surface metamaterial, which functions as a perfect absorber at the resonant frequency. This sensor has a uniform water‐soluble Mg film at the bottom coated with hydroxyapatite that degrades depending on the pH, and a periodic square split ring resonator metamaterial structure made on top of a lossy dielectric plate. The sensor detects the dissolution of the metamaterial due to soil pH conditions through the electromagnetic wave reflection response at GHz frequency. Because of the perfect absorbing characteristics, the influence of soil on the metamaterial's electromagnetic response is blocked, allowing for robust measurement regardless of soil type. By coating the Mg with hydroxyapatite, the difference between acidic (pH = 3.0) and neutral soils can be detected by the time difference by a factor of three in the reflectance change from 40% to 75% reflectance change, indicating a transition from absorptive to reflective of the metamaterial's response, at the resonant frequency of 4.12 GHz.

ADVERTISEMENT AS A HISTORICAL SOURCE ON THE HISTORY OF ENTREPRENEURSHIP: BASED ON THE MATERIALS OF SAMARA NEWSPAPERS AND REFERENCE PUBLICATIONS OF THE SECOND HALF OF THE XIX – EARLY XX century

The relevance of studying advertisement as a historical source on the history of entrepreneurship is due to the interest of researchers in the economic history of pre-revolutionary Russia, expansion of the research field and the source base on the topic under study. The purpose of this article is to identify historical information on the history of business development in Samara governorate in the second half of the XIX – early XX century, contained in advertisements. Materials and methods. The materials used in writing this article were advertisements published in periodicals and reference publications of Samara governorate. The research is based on the principles of historicism, multifactority and objectivity. During the research, the methods of comparative analysis and systematization were used. The scientific novelty is determined by the fact that in regional historiography, it is the first time that the analysis of advertisement as a historical source on the problem of local business functioning is given. Research results. The article analyzes advertising in periodicals and reference publications of Samara governorate in the 1850s and 1910s as a historical source on the history of regional entrepreneurship. The interrelation between the formation of the advertising business and commercial and industrial entrepreneurship is revealed. It is proved that three stages should be distinguished in advertising evolution: the 1850s–1870s; the 1880s–1890s; the 1890s–1910s. The changes in the pricing policy of newspaper editorial offices and its impact on the number of published ads are traced; the directions and forms of entrepreneurial practices presented in advertising are reflected; facts about the growing interest of nonresident entrepreneurs in Samara market are presented, the uniqueness of advertisements published in the reference edition «List of Populated Places» is established. Conclusions. The analysis of advertisements for the period from 1850s to 1910s contributed to identifying valuable historical information on the formation and development of entrepreneurial practices in Samara governorate in the second half of the XIX – early XX centuries: information was obtained on geographical location of commercial and industrial facilities, the social composition of entrepreneurs, changes in market conditions and reflection of the process of the economic and socio-cultural space formation of the region.

Optically enhancing and controlling photoacoustic signals using ultra-thin semiconductor coatings on metal surfaces.

We present a simple approach to enhance the signal strength and detection sensitivity of weak photoacoustic signals, by using ultrathin, high refractive index, absorbing semiconductor layers on metal surfaces. They form etalon resonances with reflection minima already for layer thicknesses of only a few tens of nm. Strain waves induce changes in the physical/optical thickness of the layers and/or changes in the phase and amplitude of light upon reflection from the metal-semiconductor interface. When the reflection is optically probed near the steep slope of the etalon resonance as a function of semiconductor layer thickness, the optical response is enhanced. With a 12 nm thick Ge layer on Au, we observed a 15-fold increase in the absolute reflection changes induced by strain waves compared to the signal without the Ge layer. Moreover, thin semiconductor layers can be used as transducers, enabling the generation of higher-frequency strain waves in the metal where the layer thickness determines the spectrum of these waves. Additionally, by properly choosing the semiconductor thickness and the pump-probe wavelengths, increased control over where light is absorbed is obtained. This offers some flexibility in tailoring the light absorption in both the metal and the semiconductor. We demonstrate this with a Si layer on Pt, where at 800 nm pump wavelength, most light is absorbed by Pt, while at 400 nm, both Pt and Si absorb light. Our results show the potential of this approach to address the challenge of detecting weak photoacoustic signals and to provide some control over strain wave generation.

The Impact of UV Radiation on the Hemispherical Reflectance Values and Homogeneity of Tablets Containing Clindamycin and Phenoxymethylpenicillin

Background: The pharmaceutical industry is faced with the problem of how to design and conduct tests to assess photostability during drug use and storage. In this study, the aim was to analyze the changes in total hemispherical reflectance (THR) and homogeneity in two preparations of tablets with clindamycin or tablets with phenoxymethylpenicillin stored under UV radiation. Methods: The analysis was performed for coated tablets with two types of antibiotics in and out of the direct package (i.e., non-blister and blister). The condition of UV radiation was maintained over 7 days in a Solarbox 1500 chamber. THR values were assessed after 3 and 7 days using a SOC-410 reflectometer. Hyperspectral evaluation was carried out with Specim IQ hyperspectral camera every 3 nm from 400 nm to 1030 nm. Results: THR values for both blister and non-blister tablets with clindamycin decreased significantly for the ranges 400–540 nm, 480–600 nm, 590–720 nm, and 700–1100 nm on day 3 of UV exposure. For non-blister clindamycin tablets, THR increased slightly on day 7 of the experiment compared to day 3, while THR continued to decrease for blister tablets. THR values for non-blister phenoxymethylpenicillin tablets decreased slightly on day 3 of UV exposure for the ranges 400–540 nm, 480–600 nm, 590–720 nm, 700–1100 nm, and 1000–1700 nm, and then on day 7 of UV exposure THR values increased to near baseline. In addition, non-blister clindamycin tablets showed a tendency to increase in a difference between max–min reflectance in the total spectral range as well as in visible and infrared light (p < 0.001 each). Similarly, day 7 blister tablets with clindamycin had a significantly higher max–min reflectance difference compared to day 3 blister tablets but only in the range of visible light (p = 0.034). Thus, the lowest homogeneity was demonstrated for 7 day tablets. On the contrary, the lowest homogeneity was observed for phenoxymethylpenicillin tablets on day 0 of experiment. Conclusions: UV radiation affects the total hemispherical reflectance values for clindamycin and phenoxymethylpenicillin tablets, but to a different extent and within a different spectral range for each type of tablet. The homogeneity of the tablets may also change over time with UV exposure.

Effects of thermal and non-thermal structural phase transitions on the reflectance of metavalent bonding PbGeTe

Metavalent bonding is known to contribute to the high reflectivity exhibited by the crystalline phase of phase change materials. To elucidate the impact of structural changes on metavalent bonding, we investigated the reflectivity changes of PbGeTe alloys accompanying their rhombohedral-to-cubic rocksalt transition using spectroscopic ellipsometry and ultrafast optical spectroscopy. In temperature-controlled ellipsometry, this transition is found to have a positive impact on the optical properties of PbGeTe alloys. Following femtosecond (fs)-laser excitation, coherent phonon oscillations resulting from the rhombohedral phase were observed at low temperatures. However, with an increase in excitation fluence, these oscillations disappeared immediately after excitation, suggesting that the nonthermal rhombohedral–cubic phase transition was induced by fs-laser irradiation. Despite the occurrence of such a phase transition, unfortunately the reflectivity eventually decreased without showing any increase. The reflectivity decrease induced by electron excitation and also temperature rise is considered to counteract the reflectivity increase expected from the stabilization of metavalent bonding induced by the transition to cubic phase.

Development Of Bilingual Getrans Teaching Aids To Understand Geometry Transformation Material

This research aims to develop bilingual getrans teaching aids that can be used to visualise the concept of geometry transformation. The urgency of this research lies in the effort to facilitate students' understanding of abstract concepts in geometric transformations where the development of getrans teaching aids allows students to learn actively, involving physical and visual, which is believed to improve understanding and retention of concepts. Utilizing the 4D model, the Research and Development (R&D) approach is applied. The four phases of the 4D development model are defined, designed, developed, and disseminated. The findings showed that students had trouble grasping the idea of geometric transformation at the define stage. At the design stage, preparation for the development of bilingual getrans teaching aids was carried out. At the development stage, getrans props were made as well as validation of video results by experts and limited trials to students. Then at the dissemination stage, the revised video results were disseminated based on expert advice. The conclusion of this research is that bilingual getrans teaching aids can be used for learning mathematics which students can better understand changes in position, rotation, reflection, or dilation of objects in geometry with better.

The Ability of Stryd Footpod Metrics to Reflect Changes in Metabolic Power Between Running Shoe Types

ABSTRACT It is unclear if running power (RP) estimated by the Stryd footpod device maintains its linear relationship to metabolic power (WMET) when switching between training and racing shoe types. This study determined if RP estimated by the Stryd footpod and its other spatiotemporal metrics reflect the improvement (decrease) in WMET when wearing high-performance racing shoes (HPRS; Nike AlphaFly Next%) compared to control training shoes (CTS; Nike Revolution 5). Fourteen well-trained runners completed two treadmill tests: Absolute Velocity Running Test (AVRT; 11.3–14.5 km·hr−1) and Relative Velocity Running Test (RVRT; 55–75% VO2MAX). WMET was determined with indirect calorimetry. RP was not significantly different between shoe types (p > 0.432) during the AVRT, but WMET was ~5% lower in HPRS (p < 0.001). During the RVRT, participants ran ~6% faster and at ~6% higher RP (both, p < 0.001) in HPRS for the same WMET (p = 0.869). Linear mixed models confirmed WMET was ~5% lower in HPRS for a given RP (p < 0.001). Still, RP and WMET were strongly related within shoe types (p < 0.001, conditional-R 2 = 0.982, SEE = 2.57%). Form power ratio and ground contact time correlated with energetic cost (p < 0.011) but did not fully reflect the influence of shoe type. Therefore, runners should account for their shoe type when using RP to indicate WMET between training and racing.

Programmable Mechanochromic Time Integrators

AbstractMechanochromic polymers are receiving much attention for monitoring the structural performance of materials. Current mechanochromic polymers however do not offer simultaneous detection of the duration and degree of strain while retaining memory of the strain history. Here a structurally colored polymer coating is reported that can indicate, quantify, and memorize strain over time. The mechanochromic polymers are fabricated by a simple and scalable bar coating process. The coating consists of chemically and optically distinct cholesteric liquid crystal droplets. Upon strain, the droplets deform causing an eye‐discernible reflective color change through a diffusion‐based compositional ripening process. The response depends on both the degree and duration of strain and can be easily adjusted by the concentration of droplets in the coating. The programmable mechanochromic time integrator offers simultaneous and sensitive detection of strain over a wide range while exhibiting memorability. The user‐interactive interface allows people to visually perceive the strain history of materials and introduces a novel mechanochromic material for monitoring the structural performance of materials ultimately enhancing both safety and performance.

Modeling of laser beam absorption on rough surfaces, powder beds and sparse powder layers

The energy transfer from a laser beam source to material surfaces with arbitrary geometrical features and variable surface roughness is the crucial step in many high-end engineering applications. We propose two models capable of predicting this energy transfer, applicable in different scenarios. The first is a high-fidelity numerical framework for the simulation of laser beam interaction with rough surfaces, which includes meshed geometry of arbitrary shape and material Lagrangian particles. The method discretizes the laser source as a collection of photon-type immaterial Lagrangian particles (Discrete Element Method) and is able to capture the effects of multiple reflections, angle-dependent reflectivity, and polarization change. Simulations were performed on a geometry reconstructed from a rough copper sample to reveal the impact of the polarization effects. This method is generally applicable to any surface where the effects of inelastic light scattering are not expected to play a significant role. The second model is a novel phenomenological correlation specifically designed to predict the effective reflectivity of sparse powder layers, which occur for example when metal vapor is recondensed and redeposited on the substrate during laser welding. The correlation is compared to the predictions obtained from the simulation framework and has been favorably compared to experimental data in a separate publication.

Experimental study on optical properties of various paraffin-based PCM glazing unit and radiative transfer model optimization

Integrating phase change material (PCM) into glazing units can lead to the ability of dynamic response to solar radiation and enhance thermal mass. In order to clarify the optical performance of phase change material glazing unit (PCMGU) during the dynamic response stage, this study analyzes the variations of transmittance and reflectance of PCMGUs filled with different paraffins during phase change process, by using a spectrophotometer and a temperature measurement device. Additionally, the impact of the paraffin cooling rate on this process was also examined. The experimental results indicate that: (1) During the solid-liquid phase change process, the curve of PCMGU transmittance and reflectance versus paraffin temperature exhibits a significant linear characteristic, with 75–93 % of transmittance and reflectance changes appearing during this stage; (2) Adjusting the paraffin cooling rate does not alter this linear characteristic; (3) Approximately 19 % and 36 % of PCMGU transmittance and reflectance changes occur during the solid-solid phase change process, respectively. Finally, based on the experimental patterns, the radiative transfer model for PCMGU was optimized, reducing its calculation error to a range of 0.17–0.92 times that of previous models (in terms of root mean square error).

A paper-based colorimetric point-of-care testing kit using novel two-dimensional CuBO2 nanoplates for the efficient detection of Vitamin C and fabrication of a highly sensitive optical sensor

This work explores the development of a colorimetric on-spot testing kit and the fabrication of an optical sensor to efficiently detect Vitamin C(VC) using novel 2D-CuBO2 nanoplates, a vital marker for health and disease diagnostics. Although CuBO2 exhibits promising properties in various fields, including transparent conducting domains, its application toward sensing remains unexplored. Here, the authors report the primary utilization of 2D- CuBO2 as a potential candidate for sensing, specifically VC. The 2D-CuBO2 is synthesized through a one-pot sol-gel process followed by comprehensive characterization using various analytical techniques. The investigation of the effect of pH on the selective detection of VC was identified to be at a pH of 7. A paper-based sensor and device prototype for the on-spot detection is fabricated, calibrated, and analysed, showcasing the platform's sensitivity and a high degree of selectivity. The development of color can be attributed to the interaction of electromagnetic waves at the surface and interface of VC-modified aggregated CuBO2 nanoplates and, thereby, changes in the surface reflectivity leading to an observable color change. Optical sensing significantly improved the detection limit by several orders (LoD:130 nM) with a linear range of 10 μM to 10 mM.