Search

Your search keyword '"Liu, Baojiang"' showing total 287 results
Start Over Author "Liu, Baojiang" Publication Year Range Last 10 years
287 results on '"Liu, Baojiang"'

38. High-Reflectivity Force-Chromic Photonic Crystal Elastic Materials Based on Nanospheres within an Elastomer for Applications in Sensing and Textile Fields.

Author

Qi, Zhichuang, Pang, Yang, Cui, Liangliang, Huang, Zhangmi, Hu, Chunyan, and Liu, Baojiang

Abstract

By mimicking the biological process in which chameleons change the lattice spacing of guanine nanocrystals to form and regulate their skin color, scientists have prepared force-chromic photonic crystal materials (FPMs) by encapsulating arrays of photonic crystal nanospheres in elastic matrices. However, the low refractive index difference (Δn) between conventional nanospheres and elastic matrix combinations typically makes the photonic material transparent and with low color reflectance. Besides, the elastic matrix is mostly dominated by hydrogel materials, which gradually decrease or even lose the stability of the sensing material as the solvent evaporates. PS@SiO2 core–shell nanospheres with a high refractive index while reducing the risk of microplasticity are ideal for preparing FPMs. In this work, we explored the preparation method of PS@SiO2 nanospheres and prepared force-chromic photonic crystal elastomers (FPEs) by embedding them into di-(ethylene glycol) ethyl ether acrylate (DEGEEA) and polyethylene glycol monophenyl ester acrylate (PEGPEA) matrices via the coassembly method. It was found that due to the large Δn between PS@SiO2 nanospheres and acrylate matrices (Δn > 0.05), the FPE possessed a high reflectivity (R > 82%), and the color change under force stimulation is obvious. Meanwhile, the FPE had a good tensile strain and a high sensitivity (1.62 nm/%). Due to the absence of solvents in the elastic system, the FPE has excellent stability, and the structural color remains unchanged under 50 stretch/release cycling experiments. This FPE not only has a simple preparation method, fast response, high reflectivity, and good stability, but we have found through validation experiments that it has great potential in the fields of sensing, signal transmission, and smart textiles. [ABSTRACT FROM AUTHOR]

Published
2025
Full Text
View/download PDF

50. Transparent, Flexible Nanoporous Sensors with Humidity and Pressure Sensing Capabilities for Sports Health Status Monitoring.

Author

Zhang, Xinze, Zheng, Jian, Zhu, Zhijia, Hu, Chunyan, Peng, Huitao, and Liu, Baojiang

Abstract

Exercise can strengthen the body, but due to the difference in exercise volume, which makes people's cardiorespiratory adaptive capacity different, unreasonable exercise load intensity is very easy to induce cardiovascular accidents. In this paper, an electronic skin sensor for monitoring human exercise status is proposed, which is a dual sensor for detecting changes in humidity and pressure by composites of poly-(vinyl alcohol) (PVA), citric acid (CA), and silver nanoparticles (AgNPs). The nanoporous sensor consisting of a PVA-CA-AgNP composite is flexible, lightweight, sensitive, and cost-effective. The sensor responds to unit humidity changes with a sensitivity as high as 0.34% RH–1 when the relative humidity is increased from 11 to 98%, and the pressure sensing/recovery time is 200/600 ms, respectively, when compressed by an external force. The sensor can be used not only for monitoring human movement and breathing patterns but also for further applications in information encryption. The sensor's continuous detection of human joint movements and breathing rhythms proves its effectiveness in health monitoring and confirms its stability and reliability in human movement and health applications. [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results