Article
Chemistry, Multidisciplinary
Jing-Yin Xu, Xin Tong, Lucas V. Besteiro, Xin Li, Chenxia Hu, Ruitong Liu, Ali Imran Channa, Haiguang Zhao, Federico Rosei, Alexander O. Govorov, Qiang Wang, Zhiming M. Wang
Summary: By synthesizing a new type of CuInTeSe/CdS g-QDs and regulating their optoelectronic properties through controlling the shell thickness, the research has demonstrated improved photoresponse and stability, laying a foundation for future QD-based optoelectronic technologies.
Article
Chemistry, Multidisciplinary
Volodymyr Dzhagan, Nazar Mazur, Olga Kapush, Oleksandr Selyshchev, Anatolii Karnaukhov, Oleg A. Yeshchenko, Mykola I. Danylenko, Volodymyr Yukhymchuk, Dietrich R. T. Zahn
Summary: This study investigates the influence of the parameters of the shell and interface in semiconductor core/shell nanocrystals (NCs) on their optical properties and charge transfer, using Raman spectroscopy. The results show that the use of thioglycolic acid (TGA) during the synthesis leads to the formation of a CdS shell around the CdTe core in the NCs. The optical absorption and photoluminescence bands of these NCs are determined by the CdTe core, while the far-infrared absorption and resonant Raman scattering spectra are dominated by the vibrations related to the shell.
Article
Chemistry, Physical
Yonglei Sun, Hua Zhu, Na Jin, Ou Chen, Jing Zhao
Summary: Lifetime blinking, a phenomenon of fluctuations in the fluorescence lifetime of a single quantum dot over time while its fluorescence intensity remains relatively stable, has been reported in a few QD systems. In this study, statistical methods demonstrate that compact CdSe/CdS core/shell QDs also exhibit short-lived lifetime blinking events, possibly due to the activation of efficient nonradiative processes leading to intensity blinking.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Xue Bai, Finn Purcell-Milton, Yurii K. Gun'ko
Summary: Cu-Based quantum dots are being explored as a potential replacement for toxic Cd- or Pb-based QDs, with studies focusing on the impact of different reaction conditions on the resulting morphologies and optical properties. By carefully controlling the ZnS shell deposition, researchers have optimized the synthesis of CIZS/ZnS/ZnS QDs and produced highly fluorescent core/shell/shell heterostructured QDs with high PLQYs. Additionally, the successful creation of giant ZnS shell QDs opens up possibilities for further development in this area.
Article
Chemistry, Physical
Nina N. Kurus, Alexander G. Milekhin, Roman Sklyar, Bedil M. Saidzhonov, Roman B. Vasiliev, Sergei Adichtchev, Nikolai Surovtsev, Alexander Latyshev, Dietrich R. T. Zahn
Summary: The phonon spectra of core/shell CdSe/CdS nanoplatelets with different shell thicknesses were studied, revealing frequency shifts of optical modes as the shell thickness increases, which can be explained in terms of the stress state in the core and shell, as well as the influence of phonon confinement.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Nanoscience & Nanotechnology
Xuanyu Zhang, Zhihang Guo, Ruxue Li, Jiahao Yu, Baozhen Yuan, Baian Chen, Tingchao He, Rui Chen
Summary: Core-shell lead halide perovskite nanocrystals with a quasi-type II band alignment and Cs+ ions in the shell to limit ion migration and stabilize structural and optical properties. After exposure to pulsed nanosecond laser, amplified spontaneous emission (ASE) is observed, attributed to effective passivation of defects at the interface induced by laser irradiation. These core-shell PeNCs demonstrate high structural and optical stability, with an ASE threshold of 447 nJ/cm(2) under pulsed nanosecond optical pumping.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Jiakuan Zhang, Chuyue Li, Jiongzhao Li, Xiaogang Peng
Summary: Size- and shape-controlled CdSe/ZnSe core/shell and CdSe/ZnSe/ZnS core/shell/shell nanocrystals with zinc-blende structure are synthesized. The ligand strain between the inorganic crystal surface and organic ligands plays a key role in ZnSe epitaxy. The lattice strain between the CdSe and ZnSe affects the photoluminescence of CdSe/ZnSe/ZnS core/shell/shell QDs.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Tory A. Welsch, Jill M. Cleveland, D. Bruce Chase, Matthew F. Doty
Summary: The seeded growth of core/thick-shell CdTe/CdS QDs was studied, revealing the critical role of particle concentration in the shell growth mechanism and the dependence of oleic acid impact on particle concentration for a given shell thickness. Optimal conditions shift when targeting increasingly thick shells.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Physical
Biyun Ren, Bing Chen, Jianxiong Zhao, Yang Guo, Xin Zhang, Xian Chen, Yangyang Du, Zhiqin Deng, Guangyu Zhu, Feng Wang
Summary: Lanthanide-doped ScF3 nanoparticles were synthesized and studied for their thermal enhancement of upconversion, showing a significant increase in emission within a certain temperature range and high temperature sensitivity. The development of new methods may inspire the creation of thermally enhanced upconversion nanoparticles with high emission intensities.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Ananth Kamath, Christopher Melnychuk, Philippe Guyot-Sionnest
Summary: A new method was developed to grow thick, conformal CdS shells that preserve the optical properties of 5 nm HgSe cores, with the doping of the core/shell particles quantitatively tuned through a simple postsynthetic Cd treatment. The CdS shell greatly increases the intraband emission intensity and raises important questions about the fundamental limits to achievable slow intraband relaxation in quantum dots.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Sergii Morozov, Stefano Vezzoli, Alina Myslovska, Alessio Di Giacomo, N. Asger Mortensen, Iwan Moreels, Riccardo Sapienza
Summary: Giant shell CdSe/CdS quantum dots exhibit high brightness and flexibility, with near-unity quantum yield and suppressed blinking. However, their single photon purity is reduced due to efficient multiexcitonic emission. In this study, we observed a significant blueshift in the photoluminescence biexciton spectrum of pure-phase wurtzite quantum dots. By using spectral filtering, we achieved a 2.3 times reduction in biexciton quantum yield while preserving 60% of the exciton single photon emission, leading to an improvement in purity from g2(0)=0.07±0.01 to g2(0)=0.03±0.01. Furthermore, at higher pump fluence, the spectral purification was even more effective, resulting in up to a 6.6 times reduction in g2(0) by suppressing higher order excitons and shell states with larger blueshifts.
Article
Chemistry, Multidisciplinary
Xiaolan Zhou, Chaodan Pu
Summary: Surface reconstruction is used to synthesize nonpolar facets CdSe/CdS core/shell quantum dots with a dodecahedral zinc-blende structure. The successful surface reconstruction is found to be assisted by a proton shuttle.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Ivan Marri, Simone Grillo, Michele Amato, Stefano Ossicini, Olivia Pulci
Summary: The electronic properties of hydrogenated, spherical SiGe and GeSi core-shell nanocrystals with different diameters are investigated. The results show that SiGe core-shell nanocrystals always exhibit a type II band-offset alignment, while small GeSi core-shell nanocrystals do not show this type of offset. Quantum confinement and strain drive the near-band-edge states to be mainly localized on Ge atoms in small GeSi nanocrystals. In larger GeSi nanocrystals, the formation of a type II offset can be engineered by adjusting both core and shell thickness. The factors determining the band-offset character at the Ge/Si interface are discussed in detail.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Inorganic & Nuclear
Cynthia Collantes, William Teixeira, Victoria Gonzalez-Pedro, Maria-Jose Banuls, Pedro Quintero-Campos, Sergi Morais, Angel Maquieira
Summary: In this study, stable and multicolored CsPbX3@SiO2 core-shell nanoparticles were successfully prepared using a simple method. The concentration of the precursor played a crucial role in controlling the formation of the nanoparticles and the number of core-free particles. The nanoparticles exhibited high photoluminescence quantum yields and increased structural stability due to the silica coating, and they showed specific recognition of an antibody, demonstrating their potential as fluorescent probes in biosensing applications.
DALTON TRANSACTIONS
(2023)
Article
Engineering, Manufacturing
Weiwei Peng, Wenying Zhou, Yanqing Zhang, Hongmei Niu, Xinbo Dong, Guangheng Wang, Huiwu Cai, Xiangrong Liu, Mengxue Yuan
Summary: In order to simultaneously improve the dielectric constants (& epsilon;) and breakdown strength (Eb), and restrain the loss of original Si (silicon)/poly(vinylidene fluoride, PVDF), a core@double-shell structured Si@SiO2(silica)@PS(polystyrene)/PVDF composites was prepared. The dielectric properties of composites were investigated in terms of various fillers and frequency, and polarization mechanism was examined. The core@shell particles affect the dielectric properties of composites by fundamentally changing the filler-cluster size, leading to high dielectric constant (& epsilon;) and breakdown strength (Eb) but low loss.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Chemistry, Inorganic & Nuclear
Guan Wang, Yikun Wang, Ruru Meng, Yangyang Zhang, Yanmei Xing, Xiangxing Xu, Jingyang Niu
DALTON TRANSACTIONS
(2018)
Article
Materials Science, Multidisciplinary
Ruru Meng, Qian Li, Guan Wang, Jingyang Niu
MATERIALS CHEMISTRY AND PHYSICS
(2018)
Article
Multidisciplinary Sciences
Guan Wang, Jianwei Ji, Xinwen Zhang, Yan Zhang, Qiangbin Wang, Xiaozeng You, Xiangxing Xu
SCIENTIFIC REPORTS
(2014)
Article
Materials Science, Multidisciplinary
Guan Wang, Jianwei Ji, Xiangxing Xu
JOURNAL OF MATERIALS CHEMISTRY C
(2014)
Article
Chemistry, Inorganic & Nuclear
Ruru Meng, Xiaomei He, Jingjing Chen, Jing Yang, Guan Wang
JOURNAL OF CLUSTER SCIENCE
(2019)
Article
Chemistry, Inorganic & Nuclear
Yachun Ma, Junjun Sun, Chen Li, Nan Li, Pengtao Ma, Dongdi Zhang, Guan Wang, Jingyang Niu
INORGANIC CHEMISTRY COMMUNICATIONS
(2019)
Article
Chemistry, Inorganic & Nuclear
Ningning Guo, Ning Liu, Ruru Meng, Tingting Song, Yaohua Lu, Guan Wang
INORGANIC AND NANO-METAL CHEMISTRY
(2020)
Article
Chemistry, Multidisciplinary
Mengyuan Cheng, Yufeng Liu, Nan Li, Jingwen Shi, Weixin Du, Dongdi Zhang, Guoping Yang, Guan Wang, Jingyang Niu
Summary: This study presents the synthesis and catalytic properties of two novel telluroniobates, {Te15Nb21} and {Te10Nb14}. Both clusters demonstrate excellent catalytic activity in the amidation reactions, enabling the controllable synthesis of cyclic imides and bi-amides. This represents a breakthrough in the catalysis of polyoxoniobates.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Niuniu Zhang, Xia Wu, Kangjia Lv, Yujie Chu, Guan Wang, Xiao-Peng Sun
Summary: A series of Fe3O4/POMs composites with controllable morphology and size were successfully synthesized. The composites exhibited antiferromagnetic interactions and catalytic activity for the photodegradation of RhB solution. The study not only enriched the diversity of POM-based materials but also provided a new strategy for the development of magnetic POM catalysts.
INORGANIC AND NANO-METAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Niuniu Zhang, Xia Wu, Kangjia Lv, Yujie Chu, Haimei Qin, Dongdi Zhang, Guan Wang, Jingyang Niu
Summary: Niobate nanosheets have attracted widespread interest for their potential in catalysis, and researchers have successfully fabricated a 2D CdS/Au/HNb3O8 catalyst with efficient photocatalytic properties. This catalyst exhibits enhanced performance in hydrogen evolution, self-coupling reactions, and dye degradation compared to bare HNb3O8 nanosheets. The improvements are attributed to the efficient migration and separation of charge carriers, as well as the surface plasma resonance effect of gold nanoparticles.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Chemistry, Physical
Niuniu Zhang, Xia Wu, Kangjia Lv, Yujie Chu, Guan Wang, Dongdi Zhang
Summary: KTaO3 cubes were prepared by hydrothermal synthesis, followed by loading of Au nanoparticles on the cubes by photodeposition, and modification of CdS quantum dots on Au/KTaO3 cubes using an in situ growth method. The resulting ternary system photocatalysts exhibited superior photocatalytic properties in hydrogen evolution and dye degradation. The photocatalytic hydrogen evolution rate of the optimized CdS/Au/KTaO3 composite was 2.892 mmol g(-1) h(-1), which was significantly enhanced compared to bare KTaO3 and CdS.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Inorganic & Nuclear
Shixian Liu, Ningning Guo, Xia Wu, Niuniu Zhang, Yunping Li, Guan Wang
Summary: A series of POMs/CdTe nanocomposites with tunable photoluminescence properties were successfully synthesized, where PW12/CdTe showed emission wavelength shifts controlled by the CdTe:PW12 molar ratio. The electron acceptance ability of POMs was found to be a new method to control light emission from QDs, with potential applications in bioimaging, fluorescent probes, light-emitting diodes, and photodetectors.
INORGANIC AND NANO-METAL CHEMISTRY
(2022)
Article
Nanoscience & Nanotechnology
Ning Liu, Ningning Guo, Lin Sun, Shixian Liu, Guan Wang, Yuan Zhao
NANOSCALE RESEARCH LETTERS
(2020)
Article
Chemistry, Multidisciplinary
Guan Wang, Ruru Meng, Jing Yang, Xiaomei He, Jingjing Chen, Dongdi Zhang, Xiangxing Xu, Jingyang Niu
CHEMICAL COMMUNICATIONS
(2019)
Review
Chemistry, Multidisciplinary
Dan He, Yawen Li, Fuwen Zhao, Yuze Lin
Summary: High trap density in organic solar cells leads to localized charge carriers and reduced carrier lifetime, limiting device efficiency. This feature article summarizes the recent advances of trap suppression by material design and device engineering.
CHEMICAL COMMUNICATIONS
(2024)
Review
Chemistry, Multidisciplinary
Olivier Monfort, Arshitha Madhusudhan, Martin Motola
Summary: This article presents the advantages of coupling photocatalysis and Fenton-based processes for environmental remediation and discusses their synergy. It critically examines the simultaneous triggering of these two processes and provides insights into research approaches. The study aims to enhance understanding of this complex process and highlight the potential integration of new catalysts in current wastewater treatment technology.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Manideepa Dhar, Chittaranjan Mishra, Avijit Das, Uttam Manna
Summary: An approach of 'polymerization of monomers in its aggregated form' has been introduced to tailor the water wettability of fibrous and porous substrates, achieving hydrophobicity to superhydrophobicity transition, as well as patterned wettability. This facile chemical method provides a durable coating with adjustable and patterned wettability for various potential applications.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Saswat Ranjan Bhoi, Chhanda Debnath, Shikha Gandhi
Summary: In this article, a novel catalytic reaction using Pd(0) and Bronsted acid is reported for the synthesis of biologically important imidazolidinone-fused N-heterocycles through redox-neutral intramolecular N-allylation of indoles and pyrroles with alkynes. This atom-economical method is applicable to a wide range of substrates and eliminates the need for leaving groups or oxidizing agents commonly used in traditional allylation reactions.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Longkun Chen, Mingshuai Zhang, Meichen Liu, Zhuoyuan Liu, Yuetong Qiu, Zhilai Zhang, Fuchao Yu, Jiuzhong Huang
Summary: In this study, an efficient Rh(III)-catalyzed selective mono- and dual-C-H bond functionalization/cyclization with iodonium ylide as the sole coupling partner was demonstrated. Fused benzodiazepine skeletons were obtained in excellent yields, providing an improved approach to dual C-H unsymmetrical functionalization.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Alice Kennett, Sven Epple, Gabriella van der Valk, Irene Georgiou, Evelyne Gout, Romain R. Vives, Angela J. Russell
Summary: This study presents the design and synthesis of sulfated disaccharide inhibitors based on IdoA(2S)-GlcNS(6S), which showed potent inhibition of Sulf-2. The results suggest that IdoA(2S)-GlcNS(6S) is the shortest fragment size required for effective inhibition of Sulfs, and a trisulfated disaccharide is identified as the minimal fragment size of heparan sulfate for effective endosulfatase inhibition.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Mauro Garbini, Andrea Brunetti, Riccardo Pedrazzani, Magda Monari, Massimo Marcaccio, Giulio Bertuzzi, Marco Bandini
Summary: The self-adaptability of galvanostatic electrolysis was found to be helpful in a multistage chemo- and diastereoselective electrochemically promoted cyclodimerization of chalcones. Through a series of reductive events, densely functionalized cyclopentanes with five contiguous stereocenters were obtained (25 examples, yields up to 95%, dr values up to >20:1). Further experimental and electrochemical investigations indicated the crucial role of dynamic kinetic resolution of the aldol intermediate in the reaction mechanism.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Dhananjay S. Nipate, Neha Meena, Prakash N. Swami, Krishnan Rangan, Anil Kumar
Summary: In this study, the synthesis of functionalized benzo[a]phenazines and indazolo[2,3-a]quinolines was achieved through Rh(III)-catalyzed oxidative annulation of 2-arylquinoxalines and 2-aryl-2H-indazoles with allyl alcohols. The method showed a wide substrate scope, excellent functional group tolerance, good to high yields of annulated products, and the capability for scaled-up synthesis. A tentative mechanism of the annulation reaction was proposed based on a preliminary mechanistic investigation.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Ruonan Zhang, Abudukadi Tudi, Xia Yang, Xuping Wang, Zhihua Yang, Shujuan Han, Shilie Pan
Summary: A new lead tellurium borate material with a unique fundamental building block [B4O10] was synthesized and found to exhibit high birefringence. The structure-property relationship was discussed using first-principles calculations.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Amresh Kumar Singh, Baishali Thakurta, Anupam Giri, Monalisa Pal
Summary: This study introduces three key concepts for the quick synthesis of large-scale high-quality 2D materials films and their utilization in device fabrication.
CHEMICAL COMMUNICATIONS
(2024)
Article
Chemistry, Multidisciplinary
Reina Hagiwara, Shun Nishimura, Kosuke Okeyoshi
Summary: A copolymer-conjugated nanocatalytic system has been developed to improve electron transfer and enhance photoinduced H2 generation.
CHEMICAL COMMUNICATIONS
(2024)
