Article
Materials Science, Ceramics
E. Kolobkova, M. S. Kuznetsova, N. Nikonorov
Summary: CsPbX3 (X=Cl, Br, I) nanocrystals were successfully synthesized in fluorophosphate glasses for the first time, with controlled formation through adjustment of cooling rate and heat treatment conditions. The X-ray diffraction data and optical measurements confirmed the formation of 4-11 nm sized CsPbX3 nanocrystals, with the presence of two narrow bands in the luminescence spectra due to the introduction of two anions complicating the preparation process. The CsPb(Cl, Br)3 quantum dots exhibited high intensity photoluminescence with a quantum yield of 45-50% and narrow emission band.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Chemistry, Analytical
Xie-An Yu, Xuefei Bai, Ran Zhang, Ying Zhang, Mi Lu, Bo-Yang Yu, Shijia Liu, Jiangwei Tian
Summary: Drug-induced kidney injury can be effectively identified using a polydopamine-polyethyleneimine/quantum dots sensor, which generates fluorescent fingerprints to classify nephrotoxic mechanisms accurately. The sensor can distinguish nephrotoxic drugs in seconds, providing a promising approach for drug identification and evaluation.
ANALYTICA CHIMICA ACTA
(2021)
Article
Spectroscopy
Ghasem Rezanejade Bardajee, Mohammadreza Zamani, Hossein Mahmoodian, Hamideh Elmizadeh, Hadi Yari, Lavin Jouyandeh, Razieh Shirkavand, Mahdieh Sharifi
Summary: The urgent identification of COVID-19 in infected patients is of great importance. In this study, a novel fluorescence DNA-conjugated CdTe/ZnS quantum dots nanoprobe was designed for the detection of COVID-19 in saliva samples. The results showed that this method achieved similar detection results compared to the traditional RT-PCR method.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Chemistry, Physical
Yongsheng Yang, Zhiduo Liu, Da Chen, Bingli Gu, Bo Gao, Zihao Wang, Qinglei Guo, Gang Wang
Summary: In this study, nitrogen-doped graphene quantum dots (N-GQDs) with high blue fluorescence were synthesized using a one-pot hydrothermal method. The N-GQDs show promising potential for detecting tetracycline and sensing temperature, as well as for application in white light emitting diodes (WLEDs). The results reported here expand the possible applications of N-GQDs in environment monitoring, biosensing engineering and optoelectronic devices.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2021)
Article
Engineering, Electrical & Electronic
Jiakun An, Gaoyu Chen, Xia Zhu, Xin Lv, Jianchun Bao, Xiangxing Xu
Summary: In this study, ambipolar photodetectors based on heterojunctions of CsPbX3 quantum dots and ZnO nanocrystals were developed, and the transition between positive and negative photoconductivity was successfully controlled. The research is significant for understanding the unique properties of the material and its potential applications in functional photodetectors.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Applied
Xiuling Ji, Suping Wang, Yiyong Luo, Xiaotian Yuan, Yunlin Wei, Qi Zhang, Kunhao Qin, Yujiao Tu
Summary: Fluorescent carbon dots (CDs) derived from Weissella sp. Kl-3, known as CDs-Ws, exhibit strong fluorescence, excellent biocompatibility, and low cytotoxicity. CDs-Ws can selectively label and differentiate cells, as well as function as a fluorescence nanosensor for detecting Cr(VI) and VB12 with high sensitivity and detection limits. The CDs-Ws show great potential in bioimaging and detection of specific substances.
Article
Chemistry, Multidisciplinary
Qiqian He, Gaoyu Chen, Yongkai Wang, Xiaoyu Liu, Danting Xu, Xiangxing Xu, Ying Liu, Jianchun Bao, Xun Wang
Summary: The hybridization of CsPbX3 QDs with ITO nanocrystals can achieve a voltage-tuned photoresponse transformation from positive photoconductivity (PPC) to negative photoconductivity (NPC) in lateral drain-source structured devices. This unique mechanism shows potential for developing devices such as photodetectors, optoelectronic switches, and memories.
Article
Materials Science, Ceramics
Zhangwen Long, Shuai Yang, Jiacheng Pi, Dacheng Zhou, Qi Wang, Yong Yang, Hao Wu, Jianbei Qiu
Summary: In this study, a new method for synthesizing CsPbX3 quantum dots was developed, and by adjusting the ratio of different precursors, the emission wavelength, line width, and lifetime of the quantum dots were tunable. The quantum dots prepared by this method showed better stability in the external environment compared to those obtained using traditional methods.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Le Han, Yide Han, Junbiao Wu, Xia Zhang, Zhuopeng Wang, Yan Xu
Summary: The study presents a method to encapsulate CsPbX3 nanocrystals in a titanium silicate molecular sieve, forming stable nanocomposites with potential applications in temperature sensing and luminescent stability. The nanocomposites exhibit dual-mode temperature-readout properties and excellent stability in various polar solvents.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Analytical
Zahra Mamipour, Mohsen Kompany-Zareh, Ali Nematollahzadeh
Summary: This study developed a facile and effective nanosensor for the detection of 4-nitrophenol (4-NP) in water samples. The nanosensor exhibited turn-off fluorescent signals when exposed to 4-NP, and analysis of the excitation-emission matrix (EEM) data revealed a negative emission spectrum for 4-NP.
ANALYTICAL METHODS
(2023)
Article
Chemistry, Analytical
Zhimin Weng, Zhenglian Li, Yixuan Zhang, Mingying Zhang, Zhongnan Huang, Wei Chen, Huaping Peng
Summary: This study proposes a novel AuNC-based ECL sensing platform and explores the regulation mechanism of electron transfer on ECL. By investigating the ECL quenching effect of OM-AuNCs under the influence of Cu2+, it is found that the ECL intensity of OM-AuNCs is affected by the electron transfer process, enabling sensitive detection of Cu2+ in a low concentration range without the need for amplification techniques. This study enriches the application of ET-mediated ECL and promotes a more rational design of ECL sensors.
ANALYTICAL CHEMISTRY
(2022)
Review
Nanoscience & Nanotechnology
Bina Chaudhary, Yuwaraj K. Kshetri, Hak-Soo Kim, Soo Wohn Lee, Tae-Ho Kim
Summary: The quantum confinement effect and interesting optical properties of cesium lead halide perovskite quantum dots and nanocrystals have created new opportunities for lighting and photonic applications. Despite many unanswered questions related to the stability and properties of these materials, advancements in technology are making practical applications of quantum technologies more feasible.
Article
Chemistry, Analytical
Rong Liao, Si Dai, Biao Liu, Wenfang Deng, Yueming Tan, Qingji Xie
Summary: A novel strategy for photocurrent polarity switchable sensing is reported in this study by regulating electrostatic interactions between two semiconductor photoactive materials. The method achieves low detection limits and a wide linear detection range in the detection of HAase activity, providing a new and effective approach for photocurrent polarity switching and HAase activity detection.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Physical
Chandrakalavathi Thota, Jeevan Kumar Reddy Modigunta, Maddaka Reddeppa, Young Ho Park, Hyejin Kim, Hansol Kang, Samanth Kokkiligadda, Seongeun Lee, G. Murali, Sung Young Park, Insik In
Summary: In this study, a light-activated gas sensor utilizing carbon quantum dots and silver nanoparticles was successfully developed. By controlling the flow direction of photogenerated electrons and utilizing excellent oxygen dissociation ability, the sensor exhibited exceptional selectivity and sensitivity towards hydrogen sulfide gas, enabling detection at low concentrations.
Article
Spectroscopy
Mona E. El Sharkasy, Manar M. Tolba, Fathalla Belal, Mohamed I. Walash, Rasha Aboshabana
Summary: This study developed an environmentally-friendly optical nanosensor for rapid spectro-fluorimetric assessment of nitrofurantoin and dantrolene. Carbon quantum dots doped with sulfur and nitrogen were synthesized using a one-step technique. The nanosensor demonstrated high fluorescence emission with a quantum yield of about 0.52. The fluorescence reduction of the nanosensor showed a linear correlation with increasing concentrations of the analytes. The method was successfully applied to determine the concentrations of the drugs in commercial capsules and spiked human plasma samples with high recoveries and low RSD values. The selectivity and validity of the method were also evaluated.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
