Article
Chemistry, Multidisciplinary
Xuyang Yao, Jie Wang, Dejin Jiao, Zizhao Huang, Oumaima Mhirsi, Francisco Lossada, Lisa Chen, Bastian Haehnle, Alexander J. C. Kuehne, Xiang Ma, He Tian, Andreas Walther
Summary: A novel waterborne strategy is introduced to fabricate low-cost nanocomposite films with room-temperature phosphorescence (RTP), allowing programmable retention times of RTP signals by adjusting the polymer/nanoclay ratio for information storage and anti-counterfeiting materials. The combination of bioinspired nanocomposite design with RTP materials overcomes limitations in organic RTP compound molecular design and adds programmable temporal features to RTP materials, paving the way for practical applications as novel anti-counterfeiting materials.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Analytical
Vo Thanh Duoc, Chu Manh Hung, Hugo Nguyen, Nguyen Van Duy, Nguyen Van Hieu, Nguyen Duc Hoa
Summary: The grafted structures between SnO2 and ZnO nanowires were achieved through a two-step growth process, showing promising sensitivity for NO2 gas sensing.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Multidisciplinary
Yongfeng Zhang, Wei Zhang, Junming Xia, Chenchen Xiong, Gengchen Li, Xiaodong Li, Peng Sun, Jianbing Shi, Bin Tong, Zhengxu Cai, Yuping Dong
Summary: A breakthrough in room-temperature phosphorescence (RTP) emission performance was realized in a poly(vinylidene fluoride) (PVDF) matrix with a low glass transition temperature. Polymorph-dependent RTP emission in the PVDF matrix endows a 2.45 GHz microwave stimulus responsiveness to the material.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Analytical
Minghui Zan, Shuai An, Mingzheng Jia, Lei Cao, Li Li, Mingfeng Ge, Zaihui Wu, Qian Mei, Wen-Fei Dong
Summary: Efficient N-doped carbon dots with room-temperature phosphorescence were successfully synthesized through simple heating treatment, leading to the preparation of highly efficient N-CDs/MA nanocomposite phosphorescence materials. These materials exhibit ultralong phosphorescence lifetime in the solid state and blue-green RTP in aqueous medium, showing great potentials in applications such as ion determination, anti-counterfeiting, and information encryption.
MICROCHEMICAL JOURNAL
(2022)
Article
Chemistry, Physical
Yanhui Sun, Zhihua Luo, Shupeng Sun, Chuanxi Wang, Zhen Li, Haiying Du
Summary: The design of high-performance NO2 sensors that work at room-temperature is crucial for expanding the range of NO2 detection applications. In this study, Cr-modified ZnO@ graphene-like UC composite sensors were prepared to improve the detection sensitivity of ZnO to NO2 at room temperature. The sensor exhibited excellent NO2 sensing performance, with a response value of 2.7 at a NO2 concentration of 1 ppm. The enhanced sensing performance was attributed to the band gap narrowing and improved electron transition ability due to Cr modification, as well as the formation of new chemical bonds and enhanced electron transfer through orbital hybridization of O, Cr, and ZnO.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Liangwei Ma, Siyu Sun, Bingbing Ding, Xiang Ma, He Tian
Summary: A series of high intersystem crossing yield phosphors based on single-benzene structure were obtained in this study, showing efficient phosphorescence emission after being embedded into a polyvinyl alcohol matrix. Photo-switchable phosphorescence emission can be achieved by doping these molecules into a PMMA matrix.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Yotsarayuth Seekaew, Supaporn Kamlue, Chatchawal Wongchoosuk
Summary: Two-dimensional Ti(3)C(2)Tx Mxene has shown potential for gas sensing application at room temperature. In this study, popular NH3 sensing materials, such as graphene oxide (GO), copper oxide (CuO), and zinc oxide (ZnO), were mixed into Ti(3)C(2)Tx Mxene to create a high-performance NH3 gas sensor. Various nanocomposites were synthesized and used as NH3 sensing materials in room-temperature gas sensors. The Ti(3)C(2)Tx MXene/GO/CuO/ZnO nanocomposite gas sensor showed the best performance for NH3 sensing.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Ayano Abe, Kenichi Goushi, Masashi Mamada, Chihaya Adachi
Summary: There is currently significant interest in pure organic room-temperature phosphorescence (ORTP) in cocrystals composed of 1,4-diiodotetrafluorobenzene (DITFB) and various polycyclic aromatic hydrocarbons (PAHs) or their derivatives. The relationship between crystal packing motifs and ORTP characteristics in binary cocrystals of DITFB and PAHs (phenanthrene, chrysene, and pyrene) is investigated. The interactions between sigma-hole center dot center dot center dot pi and pi-hole center dot center dot center dot pi not only determine crystal packing motifs but also affect photoluminescence quantum yields (PLQYs).
ADVANCED MATERIALS
(2023)
Article
Chemistry, Analytical
Ekasiddh Wongrat, Thiranuch Nuengnit, Rangsan Panyathip, Narong Chanlek, Niyom Hongsith, Supab Choopun
Summary: This study presents a highly selective ammonia sensor based on ZnO nanostructures and graphene quantum dots (GQDs), which showed optimal sensor responses at room temperature. The ammonia sensing properties of ZnO:GQDs sensors are attributed to the presence of specific functional groups on the GQDs, contributing to their high responsiveness and selectivity.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Physical
Kaidi Wu, Wentao Zhang, Zichen Zheng, Marc Debliquy, Chao Zhang
Summary: In this study, controllable-sized TiO2 quantum dots were prepared via a rapid microwave-assisted solvothermal method for detecting ppb-level H2S at room temperature. The best sensing performance was achieved by the sample with ultra-small nanostructure and modified surface state, exhibiting high response, rapid response/recovery, low detection limit, good selectivity, and operating stability. The gas sensing mechanism was explained by the synergistic effect of ultra-small size, large specific surface area, and surface defects, and the practical application in detecting fish volatiles was also confirmed.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Shuyang Ying, Yanyan Wang, Zhekun Wu, Manman Huang, Lei Dong, Jiang Zhao, Changsi Peng
Summary: NO2 sensing devices based on NTG and NTG/ZnO composite materials have been proposed, showing good response performance and low concentration detection capability. The sensors exhibit good selectivity and repeatability, attributed to the heterostructure between NTG and ZnO.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Yuanhao Li, Fan Gu, Bingbing Ding, Lei Zou, Xiang Ma
Summary: Two polymers containing hexaarylbiimidazole are designed with dual emission of both fluorescence and phosphorescence, showing sensitive photochromic responses from faint yellow to brown upon exposure to ultraviolet light. This study enriches pure organic luminescent systems and provides new ideas for functional RTP materials.
SCIENCE CHINA-CHEMISTRY
(2021)
Article
Chemistry, Applied
Yuhang Zhou, Jinming Song, Ying Hu, Jingyu Cao, Yanyan Fu, Xiang Ma
Summary: This study successfully achieves stimuli-responsive room-temperature phosphorescence (RTP) through the molecular packing mode conversion of a new class of benzil derivatives. Under ultraviolet light irradiation, the enhanced molecular motion triggers the reordering of the packing mode, resulting in color response. The multilevel stimuli-responsive phenomenon is attributed to the molecular packing mode conversion and the alteration of molecular conformation of excited state. This unique property provides a facile strategy for the development of advanced smart RTP materials.
Article
Materials Science, Ceramics
Ali Raza, Rehan Abid, Imran Murtaza, Tianju Fan
Summary: Effective detection of ammonia gas is crucial due to its negative impacts on human health, environment, and ecosystem. In this study, a high-performance ammonia gas sensor was developed via dip-coating the silver interdigitated electrode with a PRZ nanocomposite solution. The synthesized PRZ ternary nanocomposite exhibited excellent sensing properties and the sensor showed rapid response and recovery times at a gas concentration of 350 ppm. These findings highlight the potential of PRZ composite as a reliable material for ammonia gas detection.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
V. Vidhya, P. Anbarasu, D. Geetha
Summary: Researchers focus on nanosized semiconducting oxide gas sensors due to their potential threats to the atmosphere and human health. In this study, Zn-doped SnO2-TiO2 ternary nanocomposites were synthesized using co-precipitation and hydrothermal methods. Different compositions of ZnO-doped SnO2-TiO2 nanocomposites (STZ1, STZ2, STZ3) were obtained and characterized using X-ray diffractogram, Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy, and UV-diffused reflectance spectroscopy (UV-DRS). Thick films of STZ1, STZ2, and STZ3 were coated onto glass substrates to construct sensing devices. The STZ2 sensor exhibited the best selectivity for formaldehyde, with maximum sensitivity at 100 ppm gas concentration and response and recovery times of 8 s and 9 s, respectively, at room temperature.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)