Science China-Technological Sciences
·
2021
·Vol. 65
·期 1
·179-190
·
IF 3.572
Qi YuHao,Zheng JunPing
A wearable UV sensor is designed to realize UV detection and a warning effect on people’s excessive UV exposure. It is noteworthy that the photoelectric system and supporting material of the most conventional sensor are separated. The unstable connection between the two components and the complicated construction method makes the sensor susceptible to external motion interference and prone to failure. Herein, we developed a unique photo response mode of the UV sensor based on a novel photo responsive material. An azobenzene-containing polydimethylsiloxane (Azo-PDMS) film was prepared as the outer layer of the sensor. It integrated the functions of photo response source, support and protection, which realized the direct contact and rapid response to the UV light source. Carbon nanotube (CNT), wrapped in the middle of Azo-PDMS films as an inner layer, transformed the photomechanical response signal into the photoelectric signal. The photo response mode endows the sensor with excellent anti-motion interference capabilities and a true sense of UV-strain synchronous monitoring performance, which is of great significance to the practical application of wearable devices. In addition, based on the excellent properties of Azo-PDMS, the sensor can also protect the human body from UV damage, self-repair after fracture, and realize personalized customization through 3D printing. It makes a breakthrough in the design and construction of wearable UV sensors and paves a new way to optimize sensor photo response modes.
研究领域:
材料科学
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生物医学工程
·
传感器技术
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Li-Li Zhao,Xiao-Lei Shi,Cong-Huan Huang,Meng-Ling Zou,Ming-Yu Liang,Jie Liang,Shi-Min Kang,Lei Miao,Zhi-Gang Chen
Buildings account for approximately 40 % of global energy consumption, with more than half of that attributed to heat loss through windows. Electrochromic smart windows can effectively regulate indoor sunlight and minimize energy consumption under an external electric field. However, single-response mode significantly limits their adaptability in varying environments. Here, we develop a dual electric/thermal-responsive smart window (DRSW) by integrating a conductive deep eutectic mixture (DEM) into a temperature-sensitive poly(N-isopropylacrylamide) hydrogel, which serves as electrolyte in the device. Leveraging the introduced hydrophilic functional groups from the DEM, the yielded hydrogels showcase remarkable luminous/solar transmittance modulation (88.25 % and 71.53 %). Moreover, the interaction between components retain the transportable ions within the hydrogel, which promise the excellent ionic conductivity (>2.34 × 10 −3 S cm −1 ) both before and after phase transition. Drawing upon these unique properties, the integrated DRSW achieves four distinct reversible optical states with notable energy-saving characteristics, which can be passively triggered by ambient temperature, actively induced by an external potential, or stimulated by both. Our findings provide valuable insights for the development of next-generation energy-efficient smart windows, capable of effectively managing incident sunlight, enhancing privacy, and improving aesthetic appeal.
研究领域:
材料科学
·
能源工程
·
建筑技术
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DOI
高影响因子
TALANTA
·
2024
·
IF 5.6
Conglin Guo,Qu Tang,Jige Yuan,Shijie Li,Xiaoxiao Yang,Yuechen Li,Xiaobo Zhou,Haiwei Ji,Yuling Qin,Li Wu
The accurate discrimination of bacterial infection is imperative for precise clinical diagnosis and treatment. Here, this work presents a simplified sensor array utilizing “All-in-One” Pdots for efficient discrimination of diverse bacterial samples. The “All-in-One” Pdots sensor (AOPS) were synthesized using three components that exhibit fluorescence resonance energy transfer (FRET) effect, facilitating the efficient integration of multiple discrimination channels to generate specific fluorescence response patterns through a single detection under single-wavelength excitation. Additionally, machine learning techniques were employed to visually represent the fluorescence response patterns of AOPS upon exposure to bacterial metabolites derived from diverse bacterial species. The as-prepared sensor platform demonstrated excellent performance in analyzing eight common bacteria, drug-resistant strains, mixed bacterial samples, bacterial biofilms and real samples, presenting significant potential in the identification of complex samples for bacterial analysis.
研究领域:
生物传感
·
医学诊断
·
微生物学
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DOI
PubMed
高影响因子
Polymers
·
2023
·Vol. 15
·期 9
·1998
·
IF 5
Rong Xu,Jiafeng Tian,Yusheng Song,Shihui Dong,Yongjun Zhang
Multiple responsive hydrogels are usually constructed by the addition of many different functional groups. Generally, these groups have different responsive behaviors which lead to interleaved and complex modes of the multi-response system. It is difficult to get a practical application. In this study, we show that multi-response hydrogels can also be constructed using dynamic bonds as crosslinks. The multiple responsive hydrogel films with thicknesses on the sub-micrometer or micrometer scale can be fabricated from P(DMAA-3-AAPBA), a copolymer of N,N-dimethylacrylamide, 3-(acrylamido)phenylboronic acid, and poly(vinylalcohol) (PVA) though a simple layer-by-layer (LbL) technique. The driving force for the film build up is the in situ-formed phenylboronate ester bonds between the two polymers. The films exhibit Fabry–Perot fringes on their reflection spectra which can be used to calculate the equilibrium swelling degree (SDe) of the film so as to characterize its responsive behaviors. The results show that the films are responsive to temperature, glucose, and fructose with simple and practical linear response modes. More importantly, the speed of which the films respond to glucose or fructose is quite fast, with characteristic response times of 45 s and 7 s, respectively. These quick response films may have potential for real-time, continuous glucose or fructose monitoring. With the ability to bind with these biologically important molecules, one can expect that hydrogels may find more applications in biomedical areas in the future.
研究领域:
材料科学
·
生物医学工程
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Xin Xiao,Zhaokun Yang,Qiuyan Yu,Dongjian Shi,Weifu Dong,Hongji Zhang,Mingqing Chen
Regulating the wettability of photonic crystals (PCs) could manipulate the liquid flow, and thus, multiple response patterns were realized for information storage and sensing devices. In this paper, to realize solvent detection by response patterns with shapes and colors difference, several modified agents were introduced into hollow silica photonic crystals (HSPCs), obtaining the array sensors. The as-prepared array sensors exhibited superior sensitivity and wide detection range for organic solvents , which showed six response patterns in response to different organic solvents wiping due to surface tensions and reflective index difference of solvents. The array sensors could verify cyclohexane and N-hexane by their surface tensions differences, and verify the diiodomethane by reflective index difference with an 83 nm of reflection wavelength shift. Furthermore, information encryption and multilevel decryption were realized on modified HSPCs, different encrypted patterns and words would be revealed by ethanol solutions (5% and 15% concentration) wiping. Overall, based on the above-mentioned properties, this strategy by regulating wetting behaviours of HSPCs would pave a new route for self-reporting sensors fabrication and complex information encryption.
研究领域:
材料科学
·
纳米技术
·
光学
·
传感器
·
密码学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）