Core-shell Composite Structure Research Articles

Flexible strain sensor of core-shell composite structure based on polyamide/spandex wrapped yarn

Flexible strain sensor of core-shell composite structure based on polyamide/spandex wrapped yarn

Study on Improving the Performance of Traditional Medicine Extracts with High Drug Loading Based on Co-spray Drying Technology.

The purpose of this study is to develop modified particles with different structures to improve the flowability and compactibility of Liuwei Dihuang (LWDH) powder using co-spray drying technology, and to investigate the preparation mechanism of modified particles and their modified direct compaction (DC) properties. Moreover, tablets with high drug loading contents were also prepared. Particles were designed using polyvinylpyrrolidone (PVP K30) and hydroxypropyl methylcellulose (HPMC E3) as shell materials, and sodium bicarbonate (NaHCO3) and ammonium bicarbonate (NH4HCO3) as pore-forming agents. The porous particles (Ps), core-shell particles (CPs), and porous core-shell particles (PCPs) were prepared by co-spray drying technology. The key DC properties and texture properties of all the particles were measured and compared. The properties of co-spray drying liquid were also determined and analyzed. According to the results, Ps showed the least improvement in DC properties, followed by CPs, and PCPs showed a significant improvement. The modifier, because of its low surface tension, was wrapped in the outer layer to form a shell, and the pore-forming agent was thermally decomposed to produce pores, forming core-shell, porous, and porous core-shell composite structures. The smooth surface of the shell structure enhances fluidity, while the porous structure allows for greater compaction space, thereby improving DC properties during the compaction process.

Flame-assisted combustion preparation of highly efficient black TiO2 microspheres photocatalysts under visible light

Black TiO2 microspheres photocatalysts with high light absorption intensity and photosensitive activity were prepared by a simple two-step method of flame-assisted combustion hydrolysis of tetrabutylorthotitanate (TBOT) and NaBH4 reduction. The black TiO2 microspheres photocatalysts were characterized by XRD, TEM, XPS, EELS, and UV-Vis absorption spectroscopy. The results show that the reduced TiO2 exhibits a unique core-shell composite structure with a large number of oxygen vacancies and defects in the outer layer due to Ti3+, which effectively reduces the band gap of the photocatalyst. Compared with the commercial P25 catalyst, B-TiO2 (1:7) showed higher removal of carbamazepine (CBZ) under visible light and its photocatalytic activity was 1.7 times higher than that of P25. This high photocatalytic activity is due to the efficient separation of electron-hole pairs, creating a greater number of active species. B-TiO2 (1:7) maintained high activity after five repeated cycles and achieved 89.7 % removal of CBZ.

Additive Manufacturing of Large-scale Metal Mesh with Core-shell Composite Structure for Transparent Electromagnetic Shielding/glass Heater

Transparent electromagnetic (EM) shielding glass with a metal mesh has significant potential for application in different fields of EM radiation and anti-EM interference light-transmitting observation windows. In particular, a transparent EM-shielding glass with a large-aspect-ratio metal mesh can effectively alleviate the contradictory problems of shielding effectiveness and light-transmission performance constraints. However, the fabrication of high-aspect-ratio metal meshes on glass substrates has problems such as high cost, complex processes, low efficiency, small area, and easy damage issues, which limit their application in the field of high-performance, transparent EM-shielding glass. Therefore, this paper proposes a composite additive manufacturing process based on electric-field-driven microjet 3D printing and electroplating. By fabricating metal meshes with an Ag-Cu core-shell structure on a glass substrate, EM-shielding glass with high shielding efficiency and light transmission can be manufactured without increasing the aspect ratio of the metal meshes. The prepared Ag-Cu composite metal mesh has excellent optoelectronic properties (period 250 μm, line width 10 μm, 90.1% transmission at 550 nm visible light, square resistance 0.21 Ω/sq), efficient electrothermal effect (3 V DC voltage can reach 189 °C steady-state temperature), stable EM-shielding effectiveness (average shielding effectiveness 23 dB at X-band), and acceptable mechanical and environmental stability (less than 3% change in square resistance after 150-times adhesion test and less than 6% and 0.6% change in resistance after 72 h in acid and alkali environments, respectively). This method provides a new solution for the mass production of high-performance large-area transparent electric heating/EM-shielding glass.

Infill strategies for 3D-printed CF-PEEK/HA-PEEK honeycomb core-shell composite structures

Core-shell composite structures with a carbon fibers reinforced polyetheretherketone (CF-PEEK) honeycomb core and a hydroxyapatite reinforced polyetheretherketone (HA-PEEK) solid shell were printed by a multi-material fused filament fabrication process. The effects of deposition paths on the mechanical properties of the specimens were investigated. Manufacturing defects were characterized by an optical microscope and a micro-X-ray imaging system, and the defect formation process was detected by a high-speed camera. In-plane and out-of-plane compression experiments were conducted to analyze the compression behaviors of the specimens. It was found that the specimens printed by crossing paths had inferior compression strength because of the formation of manufacturing defects at the joints of two deposition lines. By using non-crossing printing paths, the out-of-plane compression strengths of the square honeycomb core specimen and its composite structure counterpart were improved by 12.5 % and 8.3 %, respectively, whereas those of the triangular honeycomb core specimen and its composite structure counterpart were enhanced by 17.0 % and 18.4 %, respectively.

Robust Core–Shell Carbon-Coated Silicon-Based Composite Anode with Electrically Interconnected Spherical Framework for Lithium-Ion Battery

Carbon-coated Si/carbon nanotube/graphene oxide (C-Si/CNT/GO) microspheres with a robust core–shell composite structure were successfully fabricated by efficient and scalable spray-drying and chemical vapor deposition (CVD) for application as a lithium-ion battery (LIB) anode. The amphiphilic GO nanoparticles facilitated the uniform dispersion of Si nanoparticles by suppressing the CNT aggregation in the Si/CNT/GO microspheres, efficiently forming a robust Si/CNT/GO microsphere composite structure. The surface of the Si/CNT/GO microsphere composite was coated with carbon using CH4 via CVD to enhance its cycling performance. The four building block components, namely, Si nanoparticles, CNTs, and GO nanoparticles as the core and the carbon-coating layers as the shell, provided high electrochemical capacity, excellent electrical conductivity, efficient buffer space for the volume expansion of the Si nanoparticles, and high structural stability during lithiation/delithiation. The C-Si/CNT/GO composite anode also exhibited excellent electrochemical performance with high specific capacity (2921 mAh g–1 at 100 mA g–1), long cycle life (1542 mAh g–1 at 200 mA g–1 after 100 cycles), and high charge/discharge rate (1506 mAh g–1 at 6 A g–1). This approach for fabricating core–shell structured Si-based composite anodes with excellent electrochemical performance will provide a significant breakthrough for developing next-generation LIBs.

Solubility‐Boosted Molecular Sieving‐Based Separation for Purification of Acetylene in Core–Shell IL@MOF Composites

AbstractConsidering the small amount of CO2 as a contaminant in industrial gas mixtures, developing CO2‐selective adsorbents exhibit advantages in directly obtaining pure C2H2 in one‐step to reduce the energy consumption. However, it is still a great challenge due to the essential molecular feature of C2H2, including the triple bond and high polarizability. Herein, a simple but effective CO2‐facilitated transport strategy is presented to realize the overwhelming adsorption of CO2 over C2H2 by constructing core–shell composite structures using ionic liquid (IL) and metal‐organic framework (MOF). With the aid of excellent solubility of CO2 in IL and almost total exclusion of C2H2, the obtained materials boost molecular sieving‐based separation of CO2/C2H2. Density functional theory calculations combining molecular dynamic simulations revealed the solution‐diffusion mechanism for CO2, which is rarely reported in solid adsorbents. Ideal adsorbed solution theory selectivity for CO2/C2H2 with 1/1 and 1/3 volume ratios can reach over 104 and 4000 at 100 kPa with a high CO2 uptake of 40.3 cm3 g−1, superior to those of the reported materials so far. More importantly, this solution‐based separation strategy can avoid the difficulty for precise control of the regulation of adsorbent structure, which may be beneficial to practical production.

High-performance microwave absorption by optimizing hydrothermal synthesis of BaFe12O19@MnO2 core-shell composites.

Stealth technology advances in radar-absorbing materials (RAMs) continue to grow rapidly. Barium hexaferrite is the best candidate for RAMs applications. Manganese dioxide (MnO2) is a transition metal with high dielectric loss and can be used as a booster for changing polarization and reducing reflection loss. The advantages of BaFe12O19 and MnO2 can be combined in a core-shell BaFe12O19@MnO2 composite to improve the material's performance. MnO2 composition, temperature, hydrothermal holding time, and sample thickness all have an impact on the core-shell structure. In this study, a core-shell BaFe12O19@MnO2 composite is synthesized in two stages: molten salt synthesis to produce BaFe12O19 as the core and hydrothermal synthesis to synthesize MnO2 as the shell. In the hydrothermal synthesis, BaFe12O19 and KMnO4 were mixed in deionized water using different mass ratios of BaFe12O19 to KMnO4 (1 : 0.25, 1 : 0.5, 1 : 0.75, and 1 : 1). The main goal of the analysis was to figure out how well the hydrothermal synthesis method worked at different temperatures (140 °C, 160 °C, and 180 °C) and holding times (9 h, 12 h, and 15 h). The composite material was subjected to characterization using a vector network analyzer, specifically at thicknesses of 1.5 mm, 2 mm, 2.5 mm, and 3 mm. The hydrothermal temperature and composition ratio of BaFe12O19 : MnO2 are the most influential parameters in reducing reflection loss. Accurate control of the parameters makes a BaFe12O19@MnO2 core-shell composite structure with a lot of sheets. The structure is capable of absorbing 99.99% of electromagnetic waves up to a sample thickness of 1.5 mm. The novelty of this study is its ability to achieve maximal absorptions on a sample with minimal thickness through precise parametric control. This characteristic makes it highly suitable for practical applications, such as performing as an anti-radar coating material. BaFe12O19@MnO2 demonstrates performance as a reliable electromagnetic wave absorber material with simple fabrication, producing absorption at C and X band frequencies.

Synthesis, characterization, and gas adsorption performance of an efficient hierarchical ZIF-11@ZIF-8 core–shell metal–organic framework (MOF)

In this paper, the solvent-assisted linker exchange (SALE) technique was successfully applied for the synthesis of porous ZIF-11@ZIF-8 core–shell composite structure metal–organic framework (MOF). The RHO-type ZIF-11 owing to larger cavities along with higher freedom in linker rotation, acts as the core and contributes in adsorption capacity enhancement. On the other hand, the SOD-type ZIF-8 provides greater molecular sieving features due to its lower degree of linker flexibility and thereby results in an improvement of the adsorption selectivity. The morphology and structure of the fabricated MOFs were characterized by XRD, FTIR, FESEM, EDS, TEM, BET, and TGA analyses and formation of the core–shell structure was confirmed. The BET surface area and micropore volume of the synthesized ZIF-11@ZIF-8 MOF were obtained as high as 1023.4 m2/g and 0.435 cm3 g−1, respectively. Gas adsorption measurements were carried out for CO2, N2, CH4, C2H6, and C2H4 gases at 298 and 328 K and equilibrium pressures up to 4 bar. The results revealed a remarkable rise (∼100 %) in CO2 adsorption capacity of ZIF-11@ZIF-8 nanoparticles (8.21 mmol g−1), compared to the pristine ZIF-11 (4.35 mmol g−1) at 298 K. The CO2/N2 and CO2/CH4 adsorption selectivity values were also augmented by 131 % and 92 %, respectively. In addition, the fabricated core–shell MOF, exhibited greater ethane (C2H6) adsorption capacity by ∼ 65 %, along with ethane to ethylene (C2H4) adsorption selectivity enhancement by ∼ 50 %. The higher adsorption capacity values without sacrificing adsorption selectivity suggests that the controlled core–shell MOF structures would be promising candidates for effective separation of CO2 from CH4 and N2 as well as C2H6 from C2H4.

Fast UV photoresponse from Aluminum doped zinc oxysulphide composite nanowires by efficient charge-exchange interactions

For the development of technologically advanced material for the next-generation smart electronic devices, we prepared zinc oxysulphide (ZnOS) composite nanowires (NWs) through a two-step process. The electronic and optical properties of this system are further influenced by doping with aluminium. First, 2 at.% Al-doped ZnO NWs were prepared on Si and then it is subjected to sulphidation process for different time durations. Sulphidation for short duration results in a core-shell structure and ZnOS composite structure was achieved after 4 h of sulphidation. We systematically studied the structural, photoluminescence and UV photoresponse properties of the ZnOS composite NWs to investigate the superiority of this kind of semiconducting composite material. Structural characterization of the ZnOS NWs confirms hexagonal crystalline composite structure with small clusters of ZnS phase. Interestingly, these ZnOS composite NWs emit three different colours of emission in UV, blue and green regions. UV photoluminescence (PL) intensity is found to gradually increase with the increased duration of the sulphidation process. We obtained a significant improvement in the UV photoresponse behaviour of the ZnOS composite NWs compared to the bare doped ZnO NWs. The obtained photoresponse time is much faster (200 ms) than the case of virgin ZnO NWs (∼ several seconds) as well as with high responsivity (0.29 A/W). The observed improved PL and fast UV photoresponse are explained based on hoping charge transfer through the interface and modification of defects that is supported by x-ray photoelectron spectroscopy data. Therefore, prepared ZnOS composite NWs is found to be a technologically advanced material for the application as an efficient UV photosensor.

Synthesis of C/SiC core-shell fibers through siliconization of carbon fibers with SiO gas in semi-closed reactor

Novel C/SiC core-shell fibers have been synthesized through incomplete conversion of carbon fibers by their siliconization with SiO gas. The synthesis was performed in the laboratory-made semi-closed batch-type reactor at 1380 °C for 3 h using a 9:1 M ratio mixture of Si and SiO2 powders as a solid source of SiO gas. The conversion rate of carbon into SiC was 34.0%. All synthesized fibers had a distinct C/SiC core-shell composite structure. The fiber product was of fairly good uniformity in respect of the shell thickness which varied approximately from 0.6 μm to 0.8 μm depending on the location of fibers inside the reactor. It was revealed that the formation of the shell was the result of inward growth of the SiC product layer. The effectiveness of the proposed semi-closed reactor for the synthesis of C/SiC core-shell fibers has been demonstrated.

Fluorescence assay of oxytetracycline in seawater after selective capture using magnetic molecularly imprinted nanoparticles

A comprehensive strategy for manufacturing a novel sorbent based on magnetic molecularly imprinted polymers (MMIPs) is addressed for selective capture of oxytetracycline from seawater. The novel MMIPs were synthesized by nano-Fe3O4 as sacrificial matrix and adsorption properties of the polymers demonstrate rapid adsorption kinetics, high adsorption capacity, and specificity towards oxytetracycline provided by the core-shell composite structure. After screening the critical parameters by multivariate optimization, a magnetic imprinting solid phase extraction method combined with fluorescence spectrophotometry (MMIP-SPE-FL) was constructed for sensitive determination of oxytetracycline in seawater samples. The results show a good linear response dependence on the spiking concentration of 3–100 μg L−1, and a satisfactory limit of detection of 0.7 μg L−1 after the MMIP-SPE preconcentration. Seven seawater samples from Jiaozhou bay were analyzed to give recoveries in the range of 89.75–107.65% with relative standard deviation values of less than 5.44% (n = 3).

Design and additive manufacturing of novel conformal cooling molds

Additive manufacturing (AM) offers high-freedom in the design and processing of components with complex internal structures. In this work, a new injection mold with the self-supporting large cooling channel and tailored porous structures was designed to improve cooling efficiency and save AM build costs. The optimized internal supports suppressed the collapse and warpage of large channels, which improves the manufacturability and breaks the geometric constraints of laser powder bed fusion (LPBF). The formable diameter of self-supporting channels is significantly increased (≥20 mm). In comparison to the 8 mm normal-sized channel, the self-supporting 13 mm channel reduces the cooling time of more than 20%. Additionally, the porous diamond structure was designated in the assembly part of the mold to save the materials and build time. To tune the strength, a core-shell composite structure with solid shell surrounding inner porous structures is designed. The influence of the wall thickness on the mechanical property of the composite structure was explored, which guides the specific mold design. Finally, a mold with the above-mentioned novel design was successfully processed by LPBF, which substantiates the manufacturability of innovative design. This work also inspires other industrial applications of AM-processed components with improved performance and functionality.

The role of electro-sprayed silica-coated zinc oxide nanoparticles to hollow silica nanoparticles for optical devices material and their characterization

Studies of the synthesis of composite zinc oxide-silica (ZnO@SiO2) particles remain a great challenge in terms of obtaining a more precise design and suppress the agglomeration of pure ZnO. However, recent methods encounter problems in production, such as time consumption, multistep processes, and agglomeration of the final product. To this end, a one-step process for the production of composite ZnO@SiO2 particles which has good potential as UV-attenuating materials was proposed via the electrospray method for the first time. The results from this study offer, for the first time, new insights into the design of ZnO@SiO2 as a core-shell particles morphology in which ZnO was coated with SiO2 by using the electrospray method with good control of particle agglomeration. A possible core-shell formation mechanism is proposed to offer an in-depth understanding. When tested as ultraviolet (UV) attenuation materials, the obtained core-shell particles exhibited an activation transmission near 30 % in the wavelength range of 280−400 nm under UV A and B light. This activation transmission is better than that of the same composite without a core-shell structure. Another particle with different characteristics (e.g., hollow SiO2) was obtained after the removal of ZnO from the core-shell composite structure. The activation transmission of hollow silica reached approximately 80 % under UV–vis light, indicating that hollow SiO2 has potential applications in future transparent devices.

Effect of particle size on magnetodielectric and magnetoelectric coupling effect of CoFe2O4@BaTiO3 composite fluids

CoFe2O4 particles with two different sizes were prepared using hydrothermal method by controlling the technological parameters. On that basis, core–shell structure CoFe2O4@BaTiO3 (CFO@BTO) particles were prepared by sol–gel process. The surfactant treated composite particles were then distributed into a highly-insulating heptane to form CFO@BTO composite fluids. Influences of CFO particle size on the magnetodielectric and magnetoelectric coupling effect were comparatively investigated. XRD, TEM and SAED results indicate that the size of CFO particles are ~ 12 and ~ 18 nm, respectively, while the prepared CFO@BTO particles show bi-phase and core–shell composite structure, and the size of CFO@BTO particles are ~ 28 and ~ 35 nm, respectively. The composite fluids show quasi super paramagnetic behavior at room temperature due to the size effect and Brovnian motion. When the size of CFO is 18 nm, the CFO@BTO composite fluids shows larger remnant magnetization and coercive field. Strong dependence of dielectric properties on external magnetic field has been observed, of which the composite fluids show negative magnetodielectric effect, and the value of permittivity was decreased by 8% at 500 Oe. When size of CFO is 12 nm, the corresponding specimen with shows more obvious magnetic response, and it has larger remnant polarization. The values of both coercive electric field and remnant polarization of the two kinds of CFO@BTO composite fluids have been enhanced distinctly under the action of external magnetic field. When the particle size of CFO is smaller, the magnetolectric coupling coefficient αE of CFO@BTO composite fluid is larger, and this value decreases with increasing external magnetic field. When the particle sizes of CFO are 12 and 18 nm, the maximal values of αE are about 7 and 10 V/cm·Oe, respectively. These values are several orders of magnitude larger than that of CFO/BTO and other magnetoelectric composite ceramics. The strong coupling effect can be explained based on the formation, movement and variation of chain-like structure in the presence of external field. These results may supply useful information for enhancing coupling effect and might play important roles in practical applications in novel magnetoelectric devices.

Composition analysis of Ta3N5/W18O49 nanocomposite through XPS

A characterization of a nanocomposite material consisting of Ta3N5 nanoparticles and W18O49 nanowires is presented. The material is of interest for photocatalytic applications, with a focus on pollution reduction through the photodegradation of dye waste; under white light illumination, the combination of Ta3N5 and W18O49 yielded an enhanced rate of dye degradation relative to Ta3N5 particles alone. The facile method of synthesis is thought to be a promising route for both upscale and commercial utilization of the material. X-ray photoelectron spectroscopy revealed a core–shell composite structure with W18O49 present as an overlayer on Ta3N5; the analyzed spectra for the C 1s, O 1s, Ta 4f, N 1s, W 4f, and Na 1s regions are reported. It should be noted that due to differential charging of the underlying Ta3N5 component relative to the W18O49 shell, an additional uncompensated voltage shift may exist in the Ta 4f and N 1s spectra.

In-situ fabrication of TiO2-C core-shell particles for efficient solar photocatalysis

A facile method is proposed for the in-situ synthesis of titania-carbon (TiO2-C) core-shell composite structures with ameliorated photocatalytic properties. The particles were prepared by controlled hydrolysis of titanium alkoxides followed by calcination in a non-oxygenating atmosphere. To study the effect of fabrication technique on the size and morphology of the prepared catalyst, three different combinations of precursors and solvents were investigated. Phase purity, physical and chemical characterization of the as-synthesized catalysts were confirmed using X-ray diffraction, scanning electron microscopy, diffuse reflectance spectroscopy and Raman spectroscopy techniques. Photocatalytic activity of the catalyst was evaluated by monitoring mineralization of methylene blue dye solution under solar illumination. It was observed that compared to standard titania, samples containing carbon were up to eight times more efficient at achieving solar assisted mineralization of dye. Subsequent analysis revealed that choice of titanium alkoxide and solvent (alcohol) can significantly affect the crystallite size, color and surface area of the calcined samples. The enhanced photocatalytic activity of the TiO2-C catalysts can be attributed to improved visible light absorption and a larger surface area.

Development of a centrally vascularized tissue engineering bone graft with the unique core-shell composite structure for large femoral bone defect treatment

Great effort has been spent to promote the vascularization of tissue engineering bone grafts (TEBG) for improved therapeutic outcome. However, the thorough vascularization especially in the central region still remained as a major challenge for the clinical translation of TEBG. Here, we developed a new strategy to construct a centrally vascularized TEBG (CV-TEBG) with unique core-shell composite structure, which is consisted of an angiogenic core and an osteogenic shell. The in vivo evaluation in rabbit critical sized femoral defect was conducted to meticulously compare CV-TEBG to other TEBG designs (TEBG with osteogenic shell alone, or angiogenic core alone or angiogenic core+shell). Microfil-enhanced micro-CT analysis has been shown that CV-TEBG could outperform TEBG with pure osteogenic or angiogenic component for neo-vascularization. CV-TEBG achieved a much higher and more homogenous vascularization throughout the whole scaffold (1.52–38.91 folds, p < 0.01), and generated a unique burrito-like vascular network structure to perfuse both the central and peripheral regions of TEBG, indicating a potential synergistic effect between the osteogenic shell and angiogenic core in CV-TEBG to enhance neo-vascularization. Moreover, CV-TEBG has generated more new bone tissue than other groups (1.99–83.50 folds, p < 0.01), achieved successful bridging defect with the formation of both cortical bone like tissue externally and cancellous bone like tissue internally, and restored approximately 80% of the stiffness of the defected femur (benchmarked to the intact femur). It has been further observed that different bone regeneration patterns occurred in different TEBG implants and closely related to their vascularization patterns, revealing the potential profound influence of vascularization patterns on the osteogenesis pattern during defect healing.

RETRACTED: A magnetic core-shell composite structure modified with Ru-based chemosensor for site-specific oxygen sensing: Design strategy, characterization and performance

Abstract This effort focused on a site-specific composite sample with core-shell structure for oxygen sensing purpose, using Fe 3 O 4 particles as magnetic core, silica molecular sieve MCM-41 as supporting shell and a Ru(II)-based complex having large conjugation planes as sensing probe, respectively. These rigid conjugation planes were supposed to broaden electronic distribution of excited electrons and increase their decay lifetime, so that their sensing collision probability with O 2 molecules could be improved, favoring oxygen sensing. This core-shell composite structure was characterized by electron microscope images, XRD patterns, IR spectra, N 2 adsorption/desorption and thermal analysis. Photophysical analysis indicated that its emission was quenchable by O 2 following a dynamic sensing mechanism. This composite structure gave a high sensitivity of 15.05 with response time of only 8 s. Good stability and, more importantly, linear response were obtained, which was attributed to the covalent grafting between sensing probe and supporting matrix.

Towards a core–shell composite structure loaded with a Ru-based sensing probe and its improved site-specific oxygen sensing performance

The following paper was devoted to a site-specific core–shell composite structure loaded with a Ru-based sensing probe, using Fe3O4 particles as core and silica molecular sieve MCM-41 as shell, respectively. A diamine ligand with large conjugation plane was incorporated into this sensing probe, hoping to increase electronic distribution and decay lifetime of excited electrons for sensing collision, which consequently improved sensing performance. This hybrid structure was discussed and confirmed by means of electron microscope images, XRD patterns, IR spectra, N2 adsorption/desorption and thermal analysis. Photophysical analysis on this composite sample confirmed that its emission was quenchable by O2 molecules following a dynamic sensing mechanism. In virtue of this modified sensing probe with large conjugation planes, sensitivity was determined as high as 12.3 with response time of 8s which were found superior to literature values. Good stability and, more importantly, linear response, were confirmed owing to the covalent immobilization between sensing probe and supporting host.