Acceptable Transparency Research Articles

Enhancing the mechanical properties of polylactic acid (PLA) composite films using Pueraria lobata root microcrystalline cellulose

To enhance the mechanical properties of polylactic acid (PLA) material, the PLA-based composite films are prepared by using Pueraria lobata (Willd.) Ohwi root microcrystalline cellulose (PRMCC) treated with 3-aminopropyl triethoxysilane (KH550) silane coupling agent as the dispersed phase through solvent casting method. The effects of the concentrations of PRMCC and KH550 as well as the KH550 pretreating condition (ethanol concentration) on the tensile properties of PLA-based composite films are investigated. The PLA-based composite film treated with 5 wt% PRMCC and 18 wt% KH550 (pretreated by 90 % EtOH) exhibits the greatest performance. Its elongation at break value is detected to be 4.0 %, 1.6 times as large as that of pure PLA film. The water absorption of the as-prepared PLA-based composite film is reduced from 0.49 % of the unmodified PLA/PRMCC film to 0.12 %. Moreover, the modified PLA-based composite film has a hydrophobic surface and exhibits good thermal stability. Compared with pure PLA film, the modified PLA-based composite film exhibits improved UV shielding performance with acceptable transparency. Furthermore, after adding poly(butylene adipate-co-terephthalate) (PBAT) to the composite system, the elongation at break of the PLA-based composite film is up to 7.2 %. This research can provide theoretical guidance for enhancing the performance of PLA products.

Financial and ESG Analysis of the Beer Sector Pre- and Post-COVID-19 in Italy and Spain

This study compares the analysis of the financial statements of the brewing sector in Italy and Spain due to its growth in both Mediterranean countries and its relationship with other sectors of activity of great importance in these countries. The web transparency of the sustainability indicators of the brewing sector in both countries is also analyzed, following the new regulatory framework, EU Directive 2022/2426, on sustainability information, in order to analyze, in an integrated way, the financial and sustainability information which they report for a sustainable development of the sector, in line with the Sustainable Development Goals and the European Green Deal. The methodology used involved compositional data, which are reliable at an accounting and statistical level; such data allow us to value the financial health of the sector and its relationship with the web exploration of the communication of its environmental, social, and corporate governance indicators. The results indicate a solvency of the sector in the short term, with poor margins, especially in the pandemic, which recovered in 2021 due to the sector’s resilience. On the other hand, there is a clear need to study the costs and margins of the sector in depth to improve the quality of the beers and to project the sector. The web analysis reveals acceptable transparency at the environmental level and poor transparency at the social and corporate governance level, with differences between the two countries and the population under study.

Fabrication and Characterization of Silk Fibroin-Based Nanofibrous Scaffolds Supplemented with Gelatin for Corneal Tissue Engineering

Tissue engineering is a promising approach to overcome the severe worldwide shortage of healthy donor corneas. In this work, we have developed a silk-gelatin composite scaffold using electrospinning and permeation techniques to achieve the properties comparable to cornea analog. In particular, we present the fabrication and comparative evaluation of the novel gelatin sheets consisting of silk fibroin nanofibers, which are prepared using silk fibroin (SF) (in formic acid) and SF (in aqueous) electrospun scaffolds, for its suitability as corneal stromal analogs. All the fabricated samples were treated with ethanol vapor (T) to physically crosslink the silk nanofibers. Micro/nano-scale features of the fabricated scaffolds were analyzed using scanning electron microscopy micrographs. Fourier transform infrared spectroscopy revealed characteristic peaks of polymeric functional groups and modifications upon ethanol vapor treatment. Transparency of the scaffolds was determined using UV-visible spectra. Among all the fabricated samples, the gelatin-permeated SF (in formic acid; T) scaffold showed the highest level of transparency, i.e., 77.75 ± 2.3%, which is similar to that of the native cornea (∼70%–90% [variable with age group]) with healthy acute vision. Contact angle of the samples was studied to estimate the hydrophilicity of the scaffolds. All the scaffolds except non-treated SF (in aqueous; NT) were found to be significantly stable up to 14 days when incubated in phosphate buffered saline at 37°C. Treated samples showed significantly better stability, both physically and microscopically, in comparison to nontreated samples. Proliferation and viability assays of rabbit corneal fibroblast cells (SIRC) and mouse fibroblast cells (L929 RFP) when cultured on fabricated scaffolds revealed remarkable cellular compatibility with gelatin-permeated SF (in formic acid; T) scaffolds compared to SF (in aqueous; T). Unlike other reports in the existing literature, this work presents the design and development of a nanofibrous silk-gelatin composite that exhibits acceptable transparency, cellular biocompatibility, as well as improved mechanical stability comparable to that of native cornea. Therefore, we anticipate that the fabricated novel scaffold is likely to be a good candidate for corneal tissue construct. Moreover, among the fabricated scaffolds, the outcomes depict gelatin-permeated SF (in formic acid; T) composite scaffold to be a better candidate as a corneal stromal analog that carries properties of both the silk and gelatin, i.e., optimal transparency, better stability, and enhanced cytocompatibility.

Therapeutic contact lenses fabricated by hyaluronic acid and silver incorporated bovine serum albumin porous films for the treatment of alkali-burned corneal wound

Hyaluronic acid (HA) was covalently linked to the surface of bovine serum albumin/silver (BSA/Ag) porous films to fabricate a possible contact lens. The BSA/Ag/HA films showed favorable properties as contact lenses, including acceptable transparency, high water content, good hemocompatibility, non-cytotoxicity and antibacterial properties. The therapeutic potential of the BSA/Ag/HA films was evaluated on an alkali burn-induced corneal injury model on mice. The corneal healing rate was enhanced, the corneal opacification and neovascularization were lessened, and the inflammation response was reduced. The chemical cross-linking of HA on the films prolonged the retention time of HA on the corneal surface, thus enhanced the drug efficacy and improved the patient compliance, proving the high potential of BSA/Ag/HA films as contact lenses.

Time-Resolved PIV Measurements and Turbulence Characteristics of Flow Inside an Open-Cell Metal Foam.

Open-cell metal foams are porous medium for thermo-fluidic systems. However, their complex geometry makes it difficult to perform time-resolved (TR) measurements inside them. In this study, a TR particle image velocimetry (PIV) method is introduced for use inside open-cell metal foam structures. Stereolithography 3D printing methods and conventional post-processing methods cannot be applied to metal foam structures; therefore, PolyJet 3D printing and post-processing methods were employed to fabricate a transparent metal foam replica. The key to obtaining acceptable transparency in this method is the complete removal of the support material from the printing surfaces. The flow characteristics inside a 10-pore-per-inch (PPI) metal foam were analyzed in which porosity is 0.92 while laminar flow condition is applied to inlet. The flow inside the foam replica is randomly divided and combined by the interconnected pore network. Robust crosswise motion occurs inside foam with approximately 23% bulk speed. Strong influence on transverse motion by metal foam is evident. In addition, span-wise vorticity evolution is similar to the integral time length scale of the stream-wise center plane. The span-wise vorticity fluctuation through the foam arrangement is presented. It is believed that this turbulent characteristic is caused by the interaction of jets that have different flow directions inside the metal foam structure. The finite-time Lyapunov exponent method is employed to visualize the vortex ridges. Fluctuating attracting and repelling material lines are expected to enhance the heat and mass transfer. The results presented in this study could be useful for understanding the flow characteristics inside metal foams.

Semi-transparent regenerated cellulose/ZnONP nanocomposite film as a potential antimicrobial food packaging material

A facile and straightforward route was proposed for preparing semi-transparent antimicrobial nanocomposite films using regenerated cellulose (RC) and zinc oxide nanoparticles (ZnONP) with acceptable transparency for potential food packaging applications. The RC/ZnONP nanocomposite films were characterized by their mechanical strength, UV–vis barrier properties, water vapor permeability (WVP), and antimicrobial activities against six foodborne pathogenic bacteria. The UV and oxygen barrier properties, thermal stability, and crystallinity of the RC/ZnONP nanocomposite films were significantly ( p < 0.05) improved by adding 7 wt% of ZnONP to RC films. However, the mechanical strength and WVP of the RC/ZnONP nanocomposite films were not significantly ( p > 0.05) altered by the addition of ZnONP. As shown in SEM and AFM images, the addition of ZnONP altered the surface morphology of the RC/ZnONP nanocomposite films. The results of antimicrobial tests indicated that adding 3 wt% of ZnONP could effectively inhibit the growth of pathogenic foodborne gram-positive ( B. cereus, S. aureus, and L. monocytogenes ) and gram-negative ( E. coli, S. typhimurium, and V. parahaemolyticus ) bacteria. UV transmittance and oxygen permeability of films reduced by 32 and 37%, respectively, at a ZnONP concentration of 3 wt%. Owing to the significant antibacterial activity of prepared films against the bacteria mentioned before, they could be applied for packaging meat products. • A facile method was applied to make semitransparent RC/ZnONP nanocomposite films. • RC/ZnONP showed antibacterial activity against pathogenic foodborne bacteria. • ZnONP improved the thermal stability and water vapor and UV barrier of RC films. • Surface morphology and crystallinity of RC films were affected by ZnONP.

Unique and outstanding quantum dots (QD)/tunicate cellulose nanofibrils (TCNF) nanohybrid platform material for use as 1D ink and 2D film

Quantum dots (QD)/polymer materials have wide applications in biological imaging, clinical diagnostics, anti-counterfeiting materials, light-emitting devices and solar cells. The development of QD/cellulose nanofibrils (CNF) hybrids with a more perfect structure and excellent properties is important for improving known applications. A unique tunicate CNF (TCNF) was homogeneously blended with outstanding CdSe/CdS core/shell QD to prepare a novel QD/TCNF hybrid. The QD were monodispersed on a single TCNF fibril surface as an evenly distributed monolayer with an extremely high packing density and no visible aggregation. The prepared hybrid is an excellent platform nanomaterial which was demonstrated by its good writing fidelity when applied as a 1D ink and by its good processability in the preparation of 2D films with acceptable transparency and flexibility. This one-step direct blending approach provides a facile shortcut to effectively fabricate cellulose-based high-performance functional QD nanomaterials at the single-fibril level.

Highly transparent and flexible graphitic C3N4 nanowire/PVA/PEDOT:PSS supercapacitors for transparent electronic devices

To achieve reliable flexibility and acceptable transparency for integrated electronics, the power supply sources of these devices have to meet the requirement of flexibility and transparency. Herein, we developed a facile and non-toxic way to manufacture all-solid-state supercapacitors with high capacitive performance, transparency and flexibility. The as-prepared g-C3N4 nanowires are distributed in Polyvinyl Alcohol (PVA) and Poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT:PSS) solution, transparent film could be formed by vacuum filtration. The g-C3N4 nanowires provide pseudocapacitance and PVA and PEDOT:PSS matrix provides bendable and stretchable ability. The g-C3N4/PVA electrode achieves a specific areal capacitance of 3.51[Formula: see text]mF[Formula: see text]cm[Formula: see text] with transparency of 85%, and that of g-C3N4/PVA/PEDOT:PSS is 5.32[Formula: see text]mF[Formula: see text]cm[Formula: see text] with transparency of 72%. The facile process provides a reasonable architecture for the preparation of a variety of flexible, transparent and wearable electronic devices. The flexible and transparent devices show an instant response to the finger bending with the capacitance change of more than 25%, which provides the possibility for fabricating smart flexible device to monitor human health and motion detection.

A lossless blind image data hiding scheme for semi-fragile image watermark

In this work, we propose a digital watermark approach that is invariable to rotation and guarantees the integrity of the inserted mark. The size of the resulting image is identical to the original image and the process guarantees acceptable transparency. For this, we have experimented eight substitution processes to conclude that the substitution of four bits gives a great capacity of insertion while guaranteeing an acceptable transparency for the insertion of text. However for the insertion of an image, it is recommended to substitute only one bit. This reduces the capacity but guarantees transparency of the watermarking process.

Green emitting spinel/Ba2SiO4:Eu2+/spinel sandwich structure robust ceramic phosphor prepared by spark plasma sintering

A Ba2SiO4:Eu2+ green emitting ceramic phosphor was fabricated by spark plasma sintering (SPS). The phosphor exhibited good luminescence characteristics but possessed poor mechanical strength, which was probably caused by anisotropic thermal expansion due to the orthorhombic crystal structure of Ba2SiO4. To solve this problem, Ba2SiO4:Eu2+-silica composite and Ba2SiO4:Eu2+-spinel composite ceramic phosphors were fabricated. However, a large amount of impurity phases were generated in the composite phase ceramics. Then, a spinel/Ba2SiO4:Eu2+/spinel sandwich structure translucent ceramic phosphor was fabricated by SPS, which showed robust mechanical strength, acceptable transparency and high thermal conductivity. There was no severe chemical reaction at the interface between the spinel layer and the Ba2SiO4:Eu2+ layer. The ceramic phosphor has a broad emission band with a peak at 506 nm and can be excited by UV or blue LED/LD chips. The translucent spinel/Ba2SiO4:Eu2+/spinel ceramic was evaluated and has the potential to be a phosphor converting material for wLEDs and projectors.

Optimization of the performance of transparent enclosures with deposited gold nanolayers using an analytical model

Transparent enclosures formed of nanolayer composite panels have been proposed to provide high transmittance in the visible range as well as good shielding effectiveness in applications with challenging requirements in terms of low weight, small size, and transparency. We present herein a practical method to optimize the performance of such enclosures, then based on the Robinson et al. model, an analytical model is introduced to approximately calculate their shielding effectiveness. The results of the proposed model show acceptable agreement with CST simulation and measurement results, while the Robinson et al. cannot be used to analyze composite enclosures due to its inability to take into account the effects of multilayer panels. In the next step, gold nanolayers with various thicknesses were deposited on patterned indium tin oxide (ITO) glass panels using the thermal evaporation technique. Then, considering the tradeoff between the shielding effectiveness and optical transparency, an optimum thickness for the gold nanolayer was selected. To assess the results of the performance optimization, the results for the copper, ITO glass, and gold-deposited enclosures were compared, revealing that the 10-nm gold-deposited ITO glass enclosure provided good shielding effectiveness, similar to that of the copper structure (and about 20 dB better than that of the ITO glass enclosure) as well as acceptable optical transparency, whereas metallic enclosures cannot provide transparency.

Biodegradable and Water Resistant Poly(vinyl) Alcohol (PVA)/Starch (ST)/Glycerol (GL)/Halloysite Nanotube (HNT) Nanocomposite Films for Sustainable Food Packaging

As a novel biodegradable material, poly (vinyl) alcohol (PVA)/starch (ST)/ glycerol (GL)/ halloysite nanotube (HNT) nanocomposite films were prepared by solution casting at the HNT contents of 0.25, 0.5, 1, 3 and 5 wt%. Water absorption capacity and water solubility of nanocomposite films were decreased remarkably by 44.24 and 48.05%, respectively, with increasing the HNT content from 0 to 5 wt% when compared with those of biopolymer matrices. Moreover, the water contact angle of nanocomposite films increased by 21.36o with the incorporation of HNTs. The presence of HNTs appeared to reduce the overall migration rates for PVA/ST/GL/HNT nanocomposite films when interacting with either hydrophilic or lipophilic food simulants. However, the migration rates of HNTs alone were enhanced with increasing the HNT contents in hydrophilic, lipophilic and acidic food simulants. On the other hand, the biodegradation rate and light transmittance of nanocomposite films were reduced linearly by 18.56 and 26.90% with increasing the HNT content from 0 to 5 wt%. Overall, novel PVA/ST/GL/HNT nanocomposite films in this study offer highly competitive material with excellent water resistance, good biodegradability and acceptable transparency to be potentially used for sustainable food packaging particularly targeting lipophilic and acidic foodstuffs.

Binaural Capability of Locating Sound Sources of Information Signals

The purpose of the work done was to estimate the human binaural capability of locating stereo sound sources of information signals, especially speech, choir singing, and symphonic music as compared to pulse signals. The measurements were conducted in an average-sized hall where sound was emitted by a stereo system consisting of two loudspeakers with the base width of 4.5 m.Based on the results of analysis of existing methods of binaural sound perception modelling, the estimation was performed based on correlational processing of signals recorded using a head dummy placed in various points of the room.For the recording points selected, the maximum time delays between signals arriving at a listener’s left and right ears were calculated, and the interaural cross-correlation functions were obtained. The general functions, especially the peak shift, correlation interval, and peak sharpness (including the conditions when it splits into two individual ones), were analysed. The correlation factor values and levels were calculated. As a result, the conclusions regarding the capability of locating an imaginary sound source were made based on the cross-correlation function factors values, which simplified the application of this method in practice.Based on the results of experiments conducted and on the subjective sensations of perception, the authors have come to the conclusion that a stereophony area has sizes much wider than those assumed earlier from the signal time delay of 1 ms at a receiving stereo pair (representing a shift of an imaginary source towards the ear perceiving the signal earlier).At the same time, it was found that signals with a speech component are much harder to locate than pulse signals. While music signals, especially symphonic music, are close to pulse signals in terms of human locating capabilities.The found patterns have allowed us to introduce adjustments to the stereophony area calculations. Based on the research results, we suggest defining the stereophony zone border by the correlation factor value of 0.5. Given that, the interaural cross-correlation function properties and subjective perception provide for acceptable speech legibility and music transparency. The key conclusion is that this area is quite narrow for speech signals and is actually limited to the time delay of signals arriving at left and right ears – around 1 ms. Music signals have a wider stereophony area defined by the time delay between perception binaural pair components of around 10 ms. Therefore, sizes of a stereophonic sound area ought to be defined with regard to an information signal’s type.Ref. 14, fig. 3, tabl. 3.

Provocative induction of psychogenic nonepileptic seizures: Noninferiority of an induction technique without versus with placebo.

We aim to demonstrate, in a sufficiently powered and standardized study, that the success rate of inducing psychogenic nonepileptic seizures (PNES) without placebo (saline infusion) is noninferior to induction with placebo. The clinical data of 170 consecutive patients with suspected PNES who underwent induction with placebo from January 21, 2009 to March 31, 2013 were pair-matched with 170 consecutive patients with suspected PNES who underwent the same induction technique but without addition of placebo from April 1, 2013 to February 7, 2018 at the same center. The success rates of induction were 79.4% (135/170) without placebo and 73.5% (125/170) with placebo. The difference of these two proportions was 5.9%, with two-sided 95% confidence interval ranging from -3.6% to 15.2%, indicating a non-statistically significant difference. The lower bound of the 95% confidence interval (-3.6%) was above the noninferiority margin (δ=-5%), hence inferring noninferiority of induction without versus with placebo. The greater cumulative induction experiences of the clinician performer (influencing the manner/presentation of induction) may supplant the potential advantage from addition of placebo (the means utilized). Among experienced performers, provocative induction without placebo should be the preferred diagnostic approach, given more ethically acceptable transparency and the noninferior success rate when compared to the same induction technique with placebo.

Transparent, UV-proof and mechanically strong montmorillonite/alginate/Ca2+ nanocomposite hydrogel films with solvent sensitivity

Abstract Fully swollen montmorillonite/alginate/Ca2+ (Ca2+-MtAlg) nanocomposites with a specific chemical composition are expected to show well-ordered microstructure, excellent mechanical properties, unique optical properties and solvent sensitivities. Inspired by nacre, Ca2+-MtAlg nanocomposite hydrogel films with high montmorillonite mass contents (≥ 20%) were synthesised by solution casting, followed by subsequent ionic crosslinking. The fully swollen Ca2+-MtAlg nanocomposite films were mechanically flexible and stable in water. By regulating the relative content of alginate and Mt, it was possible for the hydrogel films to reach a high tensile strength of 28 MPa. Ca2+-MtAlg hydrogel films also showed acceptable transparency and high efficiency in blocking ultraviolet light. Furthermore, they demonstrated solvent sensitivity; the hydrogels lost water in either methanol or acetone, the one with an Mt/Alg mass ratio of 1:4 coiled seriously in acetone while those with a lower mass ratio were more stable in either methanol or acetone. Overall, Ca2+-MtAlg nanocomposite hydrogel films have the potential for use in stimuli-responsive load-bearing biomedical applications, skin care and beyond.

Highly flexible, transparent, and conductive silver nanowire-attached bacterial cellulose conductors

A simple, rapid method for developing conductive, ultrafine, and high aspect ratio silver nanowires (AgNWs) is reported. Transparent and flexible nanocomposites were fashioned from bacterial cellulose (BC) and AgNWs in a very straightforward and direct manner without the addition of materials or the need for specific facilities. The as-prepared BC/AgNWs composite thin films were able to demonstrate acceptable transparency (near 80% at 550 nm), high flexibility, good mechanical strength (18.95 MPa) and stable conductivity (7.46 Ω sq−1) under various bending states.

The evaluation of pharmaceutical pictograms among elderly patients in community pharmacy settings - a multicenter pilot study.

IntroductionThe search for new ways to optimize the use of medications by patients has led the pharmaceutical community to promote the idea of introducing pictograms into routine practice. The main intention of pictograms is to ease patient adherence and to reduce potential risks or errors associated with the use of medications.PurposeTo evaluate a series of pharmaceutical pictograms for patient comprehension.Patients and methodsThe study was conducted in community pharmacies within a European Union country that belongs to the professional research network. Structured interviews were used to evaluate the pictograms for patient comprehension. This consisted of an assessment of the following: the transparency and translucency of the pictograms, health literacy, and pictogram recall. Participants were also given the opportunity to provide feedback on how to improve the pictograms. The primary endpoint was pictogram comprehension. Secondary outcomes included recall of the pictograms and pictogram translucency.ResultsThe study included 68 patients with whom face-to-face interviews were performed. Low transparency results (≤25%) and extensive patient feedback in initial interviews led to the withdrawal of certain pictograms (n=15) from the evaluation. Among the pictograms included in the final stage of our research, 22 pictograms (62.8%) obtained an acceptable transparency level ≥66%. All pictograms passed the short-term recall test with positive results.ConclusionA majority of the designed and modified pictograms reached satisfactory guess-ability scores. Feedback from patients enabled modification of the pictograms and proved that patients have an important voice in the discussion regarding the design of additional pictograms.

Derivation, Evaluation, and Validation of Illustrations of Key Counselling Points for a Pediatric Eczema Action Plan.

Current eczema action plans (EAP) are based on written instructions without illustrations. Incorporating validated illustrations into EAPs can significantly improve comprehension and usability. To produce and validate a set of illustrations for key counselling points of a pediatric EAP. Illustrations were developed using key graphic elements and refined by subject experts. Illustrations were evaluated during one-on-one structured interviews with parents/caregivers of children ages 9 and younger, as well as with children ages 10 to 17 years between September 2015 and June 2016. The concepts of transparency, translucency, and short-term recall were assessed for validation. Of 245 participants, 81.3% were parents and/or caregivers of children 0 to 9 years old, and 18.7% were children between 10 and 17 years old. A total of 15 illustrations and 2 storyboards were evaluated; 9 illustrations and 2 storyboards were redesigned to reach the preset validation targets. Overall, 13 illustrations and 2 storyboards were validated. A set of illustrations for use in an EAP was prospectively designed and validated, achieving acceptable transparency, translucency, and recall, with input from patients and a multidisciplinary medical team. The incorporation of validated illustrations into eczema action plans benefits patients with limited health literacy. Future studies should evaluate if illustrations improve understanding of eczema management and translate into improved clinical outcomes.

Tensegified Folded Glass Shells and Domes

Abstract: Glass will not only be used as a transparent cladding but can be load-bearing part of the whole structure system. This paper will survey the structural capabilities of glass in Rhombus-Wing-Element folded plates system with high rate of transparency which provides the ability of covering wide spans by its moment resistant structure; but high tensile stresses increase height of folded plate sections to resist the imposed bending moment on the structure which causes decreasing of system field numbers and considerable loss of delicacy in the whole view of the structure. In this case reinforcing glass structure by cable and tensegrity systems will help to cover the weak point of glass which is in tension stresses. In this case, cables will help the section to bear bending moments and accept a considerable part of tension which decreases the tensile stress on glass structure and allow covering of wider spans by increasing the load bearing capacity and helps to have less height in sections and more fineness in the whole structure view. The structural concept and it’s characteristics in different conditions is confirmed by Finite Element Analysis which puts the effect of supporting tensegrity system on structural capabilities of the whole system and it’s fineness into focus that is an important architectural point, in comparison with the whole glass folded plates. So by using a combination of glass folded plates and tensegrity systems we will have structures with more load bearing capacity for covering of wide spans and acceptable transparency with considerable fineness and beauty.

Optical characteristics of gold film on the moth-eye structure

The development of coating optics to lower the reflected light and thereby to increase the optical efficiency of an optical system has been a critical issue over hundreds of years. Multilayered alternation of high and low refractive index layers often leads to an expensive coating process. Lately, the use of anti-reflection structured surface, which is sometimes called “moth-eye structure”, has been proposed as an applicable option. In this study, the experimental results of the reflectance and transmittance of four gold films of four different thicknesses deposited on the moth-eye structure were carried out. The moth-eye structure arrays consisted of periodic length of about 300 nm, with the diameter of about 250 nm and the height of 150 nm. Compared with the gold coating film on the flat PET substrate, the optical property of the gold film coated on the moth-eye structure showed a better result for the anti-reflection application. In addition, the transmittance of the gold film on the moth-eye structure is more uniform than that of silver film in the visible range. The 25 nm-thick gold silm on the moth-eye structure is suggested to be applied to the car window glass of antireflective films to obtain the high performance of heat insulation with acceptable transparency in the visible range.