Microwave-assisted synthesis of Mn3O4-Fe2O3/Fe3O4@rGO ternary hybrids and electrochemical performance for supercapacitor electrode

Recent advances in fluorine-doped/fluorinated carbon-based materials for supercapacitors

Desert rose like heterostructure of NiCo2O4/NF@PPy composite has high stability and excellent electrochemical performance for asymmetric super capacitor application

Manganese oxide (MnOx) is a considerable candidate for supercapacitor electrode materials owing to its large theoretical capacitance and low price, but its performance is generally limited by unsat...

Construction of Hierarchical Mn2O3@MnO2 Core–Shell Nanofibers for Enhanced Performance Supercapacitor Electrodes

Morphology-dependent electrochemical performance of MnO2 nanostructures on graphene towards efficient capacitive deionization

Interconnected network of ultrafine MnO2 nanowires on carbon cloth with weed-like morphology for high-performance supercapacitor electrodes

Holographic sensing of organic vapor is characterized at transmission and reflection geometries in ZSM-5 nanozeolites dispersed acrylamide photopolymer. Nano-zeolites as absorption medium are dispersed into the polymer to enhance the absorptivity to organic vapor. Obvious enhancements of spectrum strength are observed during the sensing process. Two primary factors causing the enhancement, absorption of nanozeolites and photopolymerization induced by broadband white light, are analyzed experimentally. Significant increment provides a quick and intuitive identification strategy for holographic sensing. Accompanying with the wavelength blue-shift, the shrinkage of sample is measured quantitatively under homogeneous white light. It is further demonstrated that the significance of nanozeolites absorption. Finally a theoretical model with mutual diffusion is used to simulate the swelling process. This study provides significant foundation for the application of holographic sensor.

Enhancement of spectrum strength in holographic sensing in nanozeolites dispersed acrylamide photopolymer.

Holographic humidity response is characterized in detail using transmission and reflection geometry in moisture-absorbing acrylamide photopolymer. The diffraction spectrum and its temporal evolution at various relative humidity are measured and analyzed. The quantitative relations between relative humidity and holographic properties of slanted gratings are determined. The responsibility of holographic gratings for various relative humidity is observed by the spectrum response of gratings. The extracted humidity constants reflect the applicability of reflection and transmission gratings at different humidity regions. The humidity reversibility experiment is achieved for confirming repeatability of the sensor. These experiments provide a probability for improving the applicability of a holographic humidity sensor. Finally, the extended diffusion model is derived by introducing the expansion coefficient to describe the dynamic swelling process. This work can accelerate development of the holographic sensor and provide a novel strategy for exploring the swelling mechanism of photopolymer.

Holographic humidity response of slanted gratings in moisture-absorbing acrylamide photopolymer.

A volume grating-based holographic sensor in highly stretchable PVA/AA polymer for sensing its micro-deformation and, hence, the displacement has been studied. One-dimensional micro-displacement induced by tensile stress is analyzed using a diffraction spectrum in two kinds of sensor construction methods, i.e., transmission and reflection. The dependence of the peak wavelength on the displacement presents a good linear relationship which provides a quantitative sensing strategy for hydrogel micro-deformation. The available sensitivity is better than 4 μm/0.5 nm (displacement/wavelength shift) using a commercial spectrometer with a resolution of 0.5 nm. Finally, the reversible deformation response further validates the practical applicability of a holographic sensor constructed by photosensitive hydrogel. The optical measurement of micro-displacement as a novel sensing strategy can accelerate the development of the holographic optical element.

Micro-deformation response of a holographic sensor in highly stretchable polymer hydrogel

The N H, N B and N B H co-doped diamond are synthesized at pressures of 5.0–6.0GPa and temperatures of 1300–1650 °C. The reaction pressure and temperatures for the transformation of graphite-to-diamond are significantly increased with the increasing of light elements content in the starting materials. The results of SEM reveal that the major surfaces defect of growth diamond in this study are steps and distort growth reliefs. The presence of re-entrant corner provided by the twinned structure play an important role in the formation of strip and slice diamond morphology.FTIR and XPS measurementsindicate that the special element composition of N H, N B and N B H co-dopeddiamond synthesized from this work will provide important information for the design of high performance diamond related materials. We also discussthe direct correlation between the formation mechanism of the natural diamond and thesynergistic doping effect of N, B, H element.

Jiang Lv

Papers

Interconnected network of ultrafine MnO2 nanowires on carbon cloth with weed-like morphology for high-performance supercapacitor electrodes

Enhancement of spectrum strength in holographic sensing in nanozeolites dispersed acrylamide photopolymer.

Holographic humidity response of slanted gratings in moisture-absorbing acrylamide photopolymer.

Micro-deformation response of a holographic sensor in highly stretchable polymer hydrogel

The study on the diamond growth and morphology from light elements (N-B-H)synergistic doping systems under HPHT