MATERIALS RESEARCH BULLETIN
·
2023
·
IF 5.4
Miaomiao Li,Tong Wu,Yiting Wang,Wei Zhang,Ruinian Hua
Biothiols are biologically important targets because their transport and metabolism are closely related to the activities of many proteins and biological enzymes. In this paper, a kind of biological probe based on the fluorescence resonance energy transfer between lanthanide oxysulfide and gold nanoparticles was developed for the detection of cysteine. Ln 2 O 2 S:Tb 3+ and Ln 2 O 2 S:Eu 3+ nanoparticles were prepared by a thermolysis method. The as-prepared fluorescent nanoparticles were modified by polyethylenimine ligand exchange to increase their hydrophilicity. Then, Au nanoparticles were added to form fluorescence resonance energy transfer systems in which Au NPs and La 2 O 2 S:Ln 3+ act as the acceptor and donor, respectively. Among the Ln 2 O 2 S:Tb 3+ and Ln 2 O 2 S:Eu 3+ systems, the cysteine content and fluorescence intensity showed good proportional proportionality, with detection limits of 6.75 nM and 14.09 nM in the range of 50∼1500 nM, respectively. The results of anti-interference experiments showed that this biological probe is highly selective for cysteine detection.
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2023
·
IF 3
Zhengquan Zhang,Yuling Wang
The micro-nano structures were successfully fabricated on Al-Li alloy by adjusting the concentration of sodium formate and controlling the hydrothermal temperature though hydrothermal treatment. The growing directions and morphologies for micro-nano structures were studied. The results show the micro-nano structures were a mixture of AlOOH and Al(OH) 3 with good crystallinity, the intensity of diffraction peaks increases with the increase of sodium formate concentration, and the growing direction of micro-nano structure varied from (2 0 0) at 110 °C and 130 °C to (1 1 1) at 150 °C. The morphologies of the micro-nano structures exhibit patterned surface with overlapping leaf-like nano-plates at 110 °C and 130 °C, nordstandite is predominant, flower-like at 150 °C,aluminum oxide hydroxide is predominant.These findings directly demonstrate that the preferential growing direction and the morphologies of micro-nano structure has been confirmed with the concentration of sodium formate and the hydrothermal temperature.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2023
·
IF 3.6
Yingzhen Wu,Lin Lin,Zheng Li,Yanan Zhang,Zhuohong Feng,Zhezhe Wang,Zhiqiang Zheng
Up to now, the research field of application of lanthanide ions doped lead-free double perovskite Cs 2 AgInCl 6 nanocrystals (NCs) was relatively limited, even less in temperature sensing. Here, Tb 3+ /Ho 3+ /Bi 3+ ions were successfully doped into Cs 2 AgInCl 6 NCs by hot-injection. The temperature sensing performance of co-doped NCs by using the fluorescence intensity ratio (FIR) was studied through the temperature-dependent emission spectra . By analyzing the influence of ions' doping concentration on temperature sensing performance, the optimal doping concentration of co-doped Cs 2 AgInCl 6 NCs was determined to be 7 % Tb 3+ , 20 % Ho 3+ and 1 % Bi 3+ . The highest absolute and relative sensitivities reach 1.48 K −1 and 2.48 %/K, respectively. We provide a new doping scheme of lead-free double perovskite NCs which have good temperature sensing performance. This co-doped NCs have great potential application value in non-contact temperature sensing in nanoscale .
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Chemistry
·
2023
·
IF 7.3
Haijiang Qiu,Jianing Wu,Min Li,Zhenyu Hu,Song Yang,Yanyan Li,Yingying Gu,Hongrui Cheng,Yuanhui Zheng
Gallium nitride quantum dots (GaN QDs), as a third-generation semiconductor material, are usually synthesized through a vapor deposition method at an elevated temperature (typically ≥800 °C). Thermal injection method is rarely reported for the synthesis of GaN QDs due to the lack of active precursors and the require of harsh reaction conditions. Here, we report the fabrication of oxygen doped colloidal GaN QDs via rapid thermal injection. By screening the reaction temperature and solvent, well-dispersed GaN QDs with a size of 3.8 nm were obtained in octadecylamine (ODA) at 360 °C. The synthesized GaN QDs show blue emission, the maximum emission wavelength is about 440 nm, and the photoluminescence quantum yield is 14.3%. Furthermore, we reveal the donor-acceptor mechanism of blue emission from GaN QDs. During the growth of GaN QDs, oxygen atoms occupy some nitrogen sites and produce a shallow oxygen donor energy level (O N ). A part of the O N can be combined with the adjacent gallium vacancy (V Ga ) to form a V Ga -O N acceptor, whose energy level is about 0.98 eV above the valence band of GaN QDs. The transition of excited electrons from the donor (O N ) to the acceptor (V Ga -O N ) is responsible for the blue emission of GaN QDs.
✓ 已验证
产品关联
DOI
高影响因子
Small Methods
·
2023
·
IF 12.4
Shanhong Wan,Shanshan Xiao,Mingquan Li,Xin Wang,Khak Ho Lim,Min Hong,Maria Ibáñez,Andreu Cabot,Yu Liu
Developing cost-effective and high-performance thermoelectric (TE) materials to assemble efficient TE devices presents a multitude of challenges and opportunities. Cu 3 SbSe 4 is a promising p -type TE material based on relatively earth abundant elements. However, the challenge lies in its poor electrical conductivity. Herein, an efficient and scalable solution-based approach is developed to synthesize high-quality Cu 3 SbSe 4 nanocrystals doped with Pb at the Sb site. After ligand displacement and annealing treatments, the dried powders are consolidated into dense pellets, and their TE properties are investigated. Pb doping effectively increases the charge carrier concentration, resulting in a significant increase in electrical conductivity, while the Seebeck coefficients remain consistently high. The calculated band structure shows that Pb doping induces band convergence, thereby increasing the effective mass. Furthermore, the large ionic radius of Pb 2+ results in the generation of additional point and plane defects and interphases, dramatically enhancing phonon scattering, which significantly decreases the lattice thermal conductivity at high temperatures. Overall, a maximum figure of merit ( zT max ) ≈ 0.85 at 653 K is obtained in Cu 3 Sb 0.97 Pb 0.03 Se 4 . This represents a 1.6-fold increase compared to the undoped sample and exceeds most doped Cu 3 SbSe 4 -based materials produced by solid-state, demonstrating advantages of versatility and cost-effectiveness using a solution-based technology.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Zhongjie Cui,Shuaitao Qin,Haiyang He,Zhuoqi Wen,Dan Yang,Zhiyan Piao,Shiliang Mei,Wanlu Zhang,Ruiqian Guo
As a kind of luminescent nanomaterial, InP quantum dots (QDs) have been regarded as one of the most potential nontoxic alternatives for cadmium-based QDs in the light-emitting devices, and much progress has been obtained recently. However, their growth kinetics remains not fully revealed yet, and the effects of the shelling process on as-synthesized InP cores have been rarely investigated. Herein, the growth kinetics of InP QDs is investigated via the convenient method of varying halide ions, and their sequential growth is proposed according to the discontinuous evolution of their first exciton absorption peaks, especially the observed typical positions, which is different from the reported continuous evolution previously and means that the specific sized InP cores appeared during the growth stage. Moreover, the impacts of ZnS are analyzed from the quantum confinement effect of ZnS on InP cores with different sizes and interfacial heterovalent bonds. The coordination between these two aspects decides the final positions of the first exciton absorption peaks of InP/ZnS QDs. Compared with the positions of the first exciton absorption peaks of bare InP QDs, insufficient confinement of the ZnS shell to small InP cores causes the red-shift, but the heterovalent bonds at the interface cause the blue-shift. Furthermore, the emissions of final InP/ZnS QDs are influenced, and the emission from 484 to 578 nm is obtained via this facile synthetic protocol. It is thought that this study can reveal the growth of InP QDs and provide guidance to design rational InP-based QDs with desired emission and high performance, contributing to the fabrication of efficient light-emitting devices.
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2023
·
IF 29.4
Ying Chen,Zeyu Liang,Qiyue Wang,Lin Xiao,Shangzhi Xie,Shengfei Yang,Xun Liu,Daishun Ling,Fangyuan Li
The alpha-synuclein (α-syn) oligomers hold a central role in the pathology of Parkinson's disease (PD). Achieving accurate detection of α-syn oligomers in vivo presents a promising avenue for early and accurate diagnosis of PD. Magnetic resonance imaging (MRI), with non-invasion and exceptional tissue penetration, offers a potent tool for visualizing α-syn oligomers in vivo. Nonetheless, ensuring diagnostic specificity remains a formidable challenge. Herein, a novel MRI probe (ASOSN) is introduced, which encompasses highly sensitive antiferromagnetic nanoparticles functionalized with single-chain fragment variable antibodies, endowing it with the capacity for discerning recognition and binding to α-syn oligomers and triggering a switchable T1–T2 MRI signal. Significantly, ASOSN possesses the unique capability to accurately discriminate α-syn oligomers from neuroinflammation in vivo. Moreover, ASOSN facilitates the non-invasive and precise visualizing of endogenous α-syn oligomers in living systems. This innovative design heralds the development of a non-invasive visualization strategy for α-syn oligomers, marking a pivotal advancement for early and accurate diagnosis of PD.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2021
·
IF 4.598
Yunfeng Shi,Mengyue Wang,Linzhu Zhou,Xueqi Shen,Jinhao Wang,Nannan Mo,Guo Zhao,Su Yang,Xinyuan Zhu,Andrew M. Smith
A new strategy for the construction, release and cellular imaging application of triethylamine-responsive fluorescent quantum dots (QDs) based on supramolecular self-assembly has been described. The supramolecular self-assembly (HPEI/SA), which was constructed through the electrostatic interactions between terminal amine groups of hyperbranched polyethylenimines (HPEI) and carboxylic acid groups of stearic acid (SA), first captured aqueous Zn 2+ ions into the hydrophilic dendritic core and subsequently encapsulated QDs/S 2- by the complexation interactions and reactions between Zn 2+ and S 2- on QDs. Due to the pH-responsive property of the HPEI/SA supramolecular self-assembly, the fluorescence of encapsulated QDs is sensitive to the triethylamine/SA mole ratio, and the encapsulated QDs can be released to the aqueous phase by cleaving HPEI/SA. The resulting fluorescent QDs/HPEI nanocomposites show promising prospects in bioimaging.
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2021
·
IF 3.512
Qian Wang,Wen-Qi Chen,Xing-Yu Liu,Yi Liu,Feng-Lei Jiang
Near-infrared (NIR)-emitting PbS quantum dots (QDs) are endowed with good stability, high quantum yield, and long lifetime in the body, so they are promising agents in biological imaging. They quickly form the so-called “protein corona” through nonspecific adsorption with proteins in biological fluids once upon exposure to the biological system. Here, PbS QDs and human serum albumin (HSA) were selected as the model system. Fluorescence quenching spectroscopic studies indicated a static quenching process caused by the addition of PbS QDs, which was corroborated by the UV–vis absorption spectroscopy and fluorescence lifetime. Thermodynamic parameters were obtained by the fluorescence quenching method. The enthalpy change and entropy change were well correlated with the “enthalpy–entropy compensation” (EEC) equation summarized in this work. The slope (α = 1.08) and the intercept (TΔS0 = 34.44 kJ mol–1) indicated that the interaction resembled a protein–protein association. The both negative signs of enthalpy change and entropy change were elucidated by a proposed “two-step association–interaction” (TSAI) model. Agarose gel electrophoresis (AGE) and dynamic light scattering (DLS) showed that the binding ratio was roughly 2:1 (HSA/QDs), resembling sandwich-like structures. Furthermore, the secondary structure of HSA depended on the concentration of added QDs and the incubation time. The results preliminarily uncovered the physicochemical properties of QDs in the presence of proteins and elucidated the role of time evolution. These will inspire us to make the fluorescent QDs more biocompatible and use them in a proper way.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Jing He,Guangyu Jia,Peiwen Wu,Yingcheng Wu,Hongping Li,Linjie Lu,Zhendong Yu,ShuaiShuai Zhou,Wenshuai Zhu,Huaming Li
Recently, production of a clean sulfur-free fuel and related green chemical processes have attracted the attention of researchers. The development of efficient desulfurizers is an effective strategy to meet this demand. Herein, a facile method to successfully construct W18O49 nanoneedles (NNs) coupled with Pt species by a spontaneous redox reaction between reductive supports and oxidative platinum precursors was revealed. The closely arranged NNs hybrids with strong metal–support electron interaction and in situ-derived carbon are successfully constructed. The Pt species are stabilized on the defective W18O49 NNs surface, which accelerates the adsorption and activation of molecular oxygen. The monolithic catalyst promotes the oxidation conversion of dibenzothiophene in the process of catalytic reactive-type desulfurization. By adjusting the reaction conditions, the catalyst shows over 99.0% dibenzothiophene conversion at only 0.8% Pt loading, and the polar products can be completely removed by extraction. Also, the catalyst showed a relatively stable regeneration and reused performance.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Yihui Wang,Zizheng Zhu,Kai Xu,Wen Guo,Tingting Yu,Maoshuai He,Wenxian Wei,Tao Yang
Pd has been considered as a promising catalyst for the electrochemical oxygen reduction reaction (ORR) in an alkaline environment. However, the strategies and fundamental understanding for improving the catalytic activity and durability of pure Pd are still challenging. Here, we develop a Pd nanobelt (NB) catalyst with expanded lattice spacing, showing both ultrahigh activity and excellent durability. Surprisingly, the surface-specific and mass activities of carbon-supported Pd NBs catalyst are 4-fold and 6-fold higher than the counterparts of the commercial Pt/C catalyst in an alkaline medium of 1.0 M KOH. After the ultralong durability test of 100 000-cycle potential sweeping, the nanostructure was still preserved and more than 80% of the surface-specific activity remained. The enhanced activity, analyzed by density functional theory (DFT) calculations, should be ascribed to the expanded lattice spacing, which could reduce the free energy (FE) of intermediates on the Pd surface and lower the overpotential for the ORR. Our work furthers the understanding of the excellent ORR catalysis of pure Pd with lattice expansion and casts light on the Pd-based catalyst design.
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2021
·
IF 8.271
Yuxiang Liao,Jun Li,Shiming Zhang,Shengli Chen
Alloying and nanostructuring are two strategies used to facilitate the efficient electrocatalysis of the oxygen reduction reaction (ORR) by Pt, where the high index surfaces (HISs) of Pt exhibit superior activity for ORR. Here, we report the fabrication of PtCu 3 nanodendrites possessing rich spiny branches exposing n (111) × (110) HISs. The dendrites were formed through an etching-modulated seeding and growing strategy. Specifically, an oxidative atmosphere was initially applied to form the concaved nanocubes of the Pt-Cu seeds, which was then switched to an inert atmosphere to promote an explosive growth of dendrites. Separately, the oxidative or inert atmosphere failed to produce this hyperbranched structure. Electrochemical dealloying of the PtCu 3 nanodendrites produced Pt 3 Cu shells with Pt-rich surfaces where HIS-exposed dendrite structures were maintained. The resulting PtCu 3 @Pt 3 Cu@Pt nanodendrites in 0.1 M HClO 4 exhibited excellent mass and area specific activities for ORR, which were 14 and 24 times higher than that of commercial Pt/C, respectively. DFT calculations revealed that Cu alloying and HISs both contributed to the significantly enhanced activity of Pt, and that the oxygen binding energy on the step sites of HISs on the PtCu 3 @Pt 3 Cu@Pt nanodendrites approached the optimal value to achieve a near peak-top ORR activity.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）