Article
Optics
Satoshi Saita, Hideya Kawasaki
Summary: This study investigates the synthesis of fluorescent silica-based nanoparticles using aminosilane coupling agents and ascorbic acid, revealing the origin of fluorescence to be surface defect pairs in silica. Hydrothermal treatment at 230°C results in highly fluorescent NPs with a quantum yield of 32.3%, while NPs synthesized at 80°C exhibit a lower quantum yield of around 2.0%.
JOURNAL OF LUMINESCENCE
(2021)
Article
Chemistry, Multidisciplinary
Shouzhen Li, Junfei Ma, Xuelin Zhao, Peide Zhu, Meng Xu, Yingchun Niu, Dixian Luo, Quan Xu
Summary: In this study, N-doped Ta4C3 quantum dots with high fluorescence quantum yield were synthesized for the first time. These quantum dots showed promising applications in liquid ion sensing and solid mechanics sensing.
CHINESE CHEMICAL LETTERS
(2022)
Article
Chemistry, Analytical
Sri Sudewi, Muhammad Zulfajri, Sandhiya Dayalan, Sodio C. N. Hsu, Genin Gary Huang
Summary: The fabrication of iron oxide quantum dots (IO-QDs) modified with glutamic acid (Glu) under controllable conditions is reported. Characterization of the IO-QDs was done using various techniques. The IO-QDs showed good stability and a high quantum yield. They were used for detecting tetracycline antibiotics in biological samples, with promising results. This study has the potential to develop a new, easy, fast, eco-friendly, and efficient sensing method for detecting tetracycline antibiotics in biological samples.
Article
Chemistry, Analytical
Keqin Yang, Li Hou, Zhifang Li, Tianran Lin, Jianniao Tian, Shulin Zhao
Summary: A ratiometric fluorescent nanoprobe for detecting peroxynitrite was successfully constructed, showing selective accumulation in mitochondria and linear detection in the range of 0-6.0 µM. This nanoprobe enables ratiometric fluorescence imaging of endogenous peroxynitrite in cell mitochondria.
Article
Chemistry, Multidisciplinary
Jacob A. Erstling, Nirmalya Bag, Thomas C. Gardinier, Ferdinand F. E. Kohle, Naedum Domnwachukwu, Scott D. Butler, Teresa Kao, Kai Ma, Melik Z. Turker, Grant B. Feuer, Rachel Lee, Nada Naguib, James F. Tallman, Henry F. Malarkey, Lieihn Tsaur, William L. Moore, Dana V. Chapman, Tangi Aubert, Saurabh Mehta, Richard A. Cerione, Robert S. Weiss, Barbara A. Baird, Ulrich B. Wiesner
Summary: The study examines the interactions of fluorescent and poly(ethylene glycol)-coated (PEGylated) core-shell silica nanoparticles with biological barriers during oral delivery. It finds that ultra-small nanoparticles below 10 nm diameter passively pass through tight junctions, while particles above 20 nm diameter are actively transported through cells. Additionally, the in vivo experiments in mice demonstrate successful passage through the body and renal clearance without protein corona formation, suggesting the nanoparticles as viable candidates for oral administration.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Analytical
Xiangjuan Zheng, Zhiying Shi, Chaojun Fu, Yuanlin Ji, Baozhu Chi, Fanrong Ai, Xiluan Yan
Summary: Titanium carbide quantum dots (Ti3C2 QDs) were synthesized using ammonia-assisted hydrothermal method, and potassium permanganate (KMnO4)-functionalized Ti3C2 QDs (Mn-QDs) were obtained by modifying Ti3C2 nanosheets with KMnO4. The luminescent Mn-QDs showed good dispersion stability and were able to specifically detect Cr3+ and Hg2+ ions. The interaction between negatively charged Mn-QDs and Cr3+/Hg2+ was due to electrostatic interactions and surface functional groups. The detection limits for Cr3+ and Hg2+ were 0.80 μM and 0.16 μM, respectively.
Article
Spectroscopy
Zhiqiang Zhou, Jianfang Cen, Naijia Jiang, Yu Sun, Zhouyang Li, Liyun Yang
Summary: In this paper, a novel ratiometric fluorescence sensor using CdSe quantum dots (QDs) was constructed for sensitive and selective detection of Ag+. The sensor is based on the formation of Ag2Se QDs. The detection limit of the sensor is 1.4 nM and it can be successfully applied to detect Ag+ in real water samples and living cells.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Chemistry, Physical
Hao Zhang, Ludan Qin, Duxia Cao, Ruifang Guan, Xiao Cheng, Chuanjian Zhou
Summary: In recent years, the challenge of achieving a high quantum yield (QY) in dilute solutions of non-aromatic fluorescent materials has received widespread attention. This study successfully designed a bioinspired molecule with a dipeptide-like structure and active silanol groups, inspired by the Clustering-triggered emission (CTE) phenomenon. The hydrolysate hPDs obtained by simple heating of the bioinspired molecule can emit strong blue fluorescence in dilute solution, and this is the first time that the emission behavior of non-aromatic fluorescent materials has been realized under sunlight. The high QY of h-PDs in aqueous solution and solid state, attributed to the condensation of active silanol groups and the presence of hydrogen bonds and N-Si coordination bonds, allows small molecules to cross-link and aggregate into dense clusters.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Analytical
Yixiu Han, Peipei Li, Yingxiang Du
Summary: A distinctive fluorescent nanoprobe for doxycycline identification was developed by encapsulating histidine and serine-functionalized graphene quantum dots into luminescent metal-organic frameworks. The synthesized nanoprobe exhibited excellent selectivity, wide detection range, and high sensitivity. The linear relation between doxycycline concentration and fluorescence intensity ratio of the nanoprobe suggests its potential for developing other fluorescence detection systems.
Article
Chemistry, Physical
C. Russo, B. Apicella, A. La Rocca, M. Sirignano
Summary: Flame synthesis is a controllable method for producing carbon dots with tunable emission properties. The equivalence ratio plays a significant role in the production of carbon dots with different emission spectra, and it is a powerful and simple tool for large-scale synthesis.
Article
Biochemical Research Methods
Dandan Ma, Huiyun Bai, Junbo Li, Yintao Li, Lihua Song, Jinping Zheng, Congxiu Miao
Summary: The developed amplified fluorescence resonance energy transfer (FRET) nanoprobe offers highly sensitive and reliable monitoring of intracellular telomerase activity, making it a potential platform for efficient tumor diagnosis and screening of telomerase-related inhibitors.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Dongyan Huang, Yuntao Wu, Fengxiang Ai, Xun Zhou, Gangbing Zhu
Summary: The study synthesized nitrogen-doped Ti3C2 quantum dots with remarkable excitation-dependent photoluminescence, which showed sensitivity in detecting Cr(VI) and AA with wide linear ranges and low detection limits. The findings suggest potential practical applications for sensing Cr(VI) and AA.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Applied
Xu-Li Miao, Wei Feng, Qin-Hua Song
Summary: In this study, three electron donor-acceptor fluorescent probes were developed for rapid detection of phosgene. Among them, probe 2a showed the fastest response time (5 s), the lowest limit of detection (1.4 nM), and significant fluorescence change from green to bright blue in solution. Test strips fabricated with probe 2a exhibited good selectivity and sensitivity for phosgene detection in the gas phase.
Article
Optics
Debasmita Kandi, Sriram Mansingh, Arjun Behera, Kulamani Parida
Summary: In this study, it was found that among the colloidal CdS quantum dots prepared in four common solvents capped with thioglycolic acid (TGA), those in dimethyl sulfoxide (DMSO) exhibited the highest relative fluorescence quantum yield, reaching 93%. Additionally, Urbach energy was calculated to provide insight into the density of states in the CdS quantum dots.
JOURNAL OF LUMINESCENCE
(2021)
Article
Engineering, Environmental
Jianying Chen, Wei-Ren Liu, Yanjuan Li, Xikun Zou, Wei Li, Jiarong Liang, Haoran Zhang, Yingliang Liu, Xuejie Zhang, Chaofan Hu, Bingfu Lei
Summary: Researchers have developed a new class of green-emitting silanized carbon dots with high photoluminescence quantum yield, photostability, and biocompatibility, which can be used to rapidly label dead cells and have potential applications in biological imaging and anti-counterfeiting.
CHEMICAL ENGINEERING JOURNAL
(2022)
