ADVANCED MATERIALS
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2013
·Vol. 25
·期 40
·5750-5755
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IF 14.829
Jizhong Song,Sergei A. Kulinich,Jian Yan,Zhigang Li,Jianping He,Caixia Kan,Haibo Zeng
Graphical Highly epitaxial ZnO nanowire-on-nanoplate structures as efficient and transferable electron field emitters are reported here. Well-faceted ZnO nanoplates can be used as efficient substrates for the epitaxial growth of nanowires with a sharp and high-quality interface, which significantly improves its field emitter performance. Because of its scalable preparation, high performance and facile transfer, the novel material is of high potential for applications in various optoelectronic devices.
研究领域:
材料科学
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纳米技术
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DOI
PubMed
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 13
·2152
·
IF 5.719
Chunhong Zhang,Hao Ren,Xiangkui Jiang,Guangfeng Jia,Zhigang Pan,Yongchun Liu
An aggregation or assembly of Ag triangular nanoplates (Ag TNPs) can cause dramatic changes in their optical properties, which is widely used in applications in the field of sensing. The assembly forms of nanoparticles are crucial for obtaining sensitive sensing signals, but it is unknown what kind of assembly dominates the aggregated Ag TNPs in aqueous solutions. Herein, using thiram-induced Ag TNP aggregation as a model, six different assembly models were established, including three planar (side-by-side, side-to-tip, and tip-to-tip) assemblies and three tridimensional (plane-to-plane, plane-to-tip, and plane-to-side) assemblies. The corresponding optical properties were then investigated. Both theoretical and experimental findings indicate that three-dimensional assemblies, especially plane-to-plane assembly, dominate the Ag TNPs aggregation solution, causing a blue shift of the absorption spectrum. Analysis of charge distribution patterns in Ag TNPs indicates that such a blue shift is caused by the electrostatic repulsive force in plane-to-plane assembly. Thus, we propose a simple colorimetric method for thiram detection using Ag TNPs as an indicator. The method exhibits a selective and sensitive response to thiram with a limit of detection of 0.13 μM in the range of 0.2–0.5 μM, as well as excellent performance in real samples like wheat.Keywords:aggregation;Ag triangular nanoplates;LSPR;colorimetric detection;thiram
研究领域:
材料科学
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分析化学
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DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
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2025
·
IF 4.7
Lang Pei,Yingqiang Yu,Zhanfeng Ma,Xusheng Wang,Qinan Mao,Jiasong Zhong
Sr2MgSi2O7/Eu2+, Dy3+ (SMSED) phosphors show promise for persistent luminescence applications due to their long afterglow and robust chemical stability. However, a trade-off exists between achieving precise size and shape control of SMSED and maintaining prolonged afterglow intensity and duration during synthesis. Herein, we unveil a molten-salt method that successfully produces uniform single-crystalline plate-like SMSED for the first time. This synthesis significantly reduces both the sintering temperature and time compared to the classic solid–state reaction (SSR) method. Owing to the nanoplates structure, uniform size distribution, and single-crystal nature, the resulting SMSED exhibited excellent afterglow performance and thermal stability, with a sustained blue afterglow exceeding 24 h and retaining >70% of its initial luminescence up to 523 K, outperforming most reported SMSED phosphors. These remarkable properties underscore the considerable potential of SMSED nanoplates for applications in fingerprint detection. This work unlocks a new synthetic frontier for achieving the controllable synthesis of SMSED phosphors, paving the way for future optimizations aimed at the development of advanced persistent luminescent phosphors.
研究领域:
材料科学
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化学
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DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2015
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IF 4.097
Zhengbo Chen,Tianhong Lou,Qian Wu,Kai Li,Lulu Tan,Jingyan Sun
In this contribution, we have developed a rapid method for the highly selective detection of mercury ions (Hg 2+ ) using citrate-stabilized triangular silver nanoplates (AgNPs). The colorimetric sensor strategy is based on the aggregation of Hg 2+ -coated AgNPs with the assistance of two amino groups of lysine, resulting in a color change of AgNP solution from blue to mauve or gray. The sensor enables the analysis of Hg 2+ with a minimum detectable concentration that corresponds to 50 nM. Meanwhile, the strategy offers excellent selectivity toward Hg 2+ against other cations. The validation of this method is carried out by analysis of Hg 2+ in tap water with satisfying recoveries over 91.35–106%.
研究领域:
分析化学
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环境科学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Kai Liu,Qikui Fan,Zhun Qiao,Zhixue Zhang,Yongzhao Zhang,Zhiqun Chen,Hao Ma,Zemin He,Zongcheng Miao,Jiaofei Huo,Duqiang Xin,Jianxin Guo,Chuanbo Gao
Plate-like metal nanomaterials have attracted much interest due to their anisotropy, high aspect ratio and large surface area. The synthesis of non-noble metal nanocrystals with high purity remains challenging due to the poor regulation mechanism of their seeds, which limits their property and application studies. This paper presents a selective etching mechanism that effectively facilitates the identification and dissolution of non-target seeds during the synthesis of Cu nanoplates. This innovative approach not only enables the production of highly pure nanoplates but also allows for the shape transformation of nanoparticles into nanoplates. The resulting Cu nanoplates exhibit tunable localized surface plasmon resonance (LSPR) characteristics and high enhanced performance in surface-enhanced Raman scattering (SERS). This method offers a novel approach to the synthesis and purification of metal nanocrystals.
研究领域:
材料科学
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纳米技术
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DOI
高影响因子
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
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2021
·Vol. 2021
·期 24
·2384-2389
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IF 2.524
Gongguo Zhang,Yanyun Ma,Wenjun Zhao,Yiqun Zheng
Graphical Non-planar platelets of gold nanocrystals with the lotus leaf- and donut-like morphologies are selectively prepared via seeded growth. The preferable deposition of Au on the central region of plate-like Au seeds is realized by the underpotential-deposition (UPD) effect of Ag ions, while epitaxial growth on the edge part and cold-welding of the newly-formed branches lead to formation of an in-plane hole when Ag + is absent. We report a seeded growth of gold (Au) nanoplates with two distinct morphologies, which are similar to a lotus leaf and a donut, respectively. The success of this synthesis relies on the use of flat Au nanoplates in high purity as seeds, followed by a controlled deposition. In particular, the presence of Ag + led to the deposition of Au atoms preferentially occurred at the central part of one face of the nanoplate and thus the formation of lotus leaf-like shape. In contrast, when Ag + was absent, the growth mainly occurred to the edge region. Then, cold-welding of newly-formed branches and further diffusion of Au atoms created holes in the nanoplate, resulting in the formation of donut-like shape. The Au nano-lotus leaves with tunable sizes exhibited absorbance in near-infrared region and enhanced chemical activities in electrochemical measurements. The current strategy is extended to fabricate Au−Ag nanoplates with a similar lotus leaf-like morphology, which also exhibited strong absorbance in near-infrared region in UV-vis extinction spectra. The current work allows the fabrication of two-dimensional Au-based nanomaterials with concave shape and three-dimensional architecture and could be potentially extended to other noble metals and alloys.
研究领域:
材料科学
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化学
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DOI
高影响因子
CRYSTENGCOMM
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2018
·Vol. 21
·期 2
·290-296
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IF 3.304
Sai Luo,Min Tang,Xingqiao Wu,Yang Ou,Zeyi Wang,Ni Jian,Xiao Li,Yangfan Lin,Yucong Yan,Jingbo Huang,Hui Zhang,Deren Yang
Pd is generally regarded as an alternative catalyst material to Pt for the oxygen reduction reaction (ORR). However, its catalytic activity and durability are much lower than those of Pt. Here, we report a facile approach for the synthesis of intermetallic Pd3Pb square nanoplates enclosed by {100} facets. The use of oleylamine (OAm), oleic acid (OA), and 1-octadecene (ODE) played important roles in the formation of the Pd3Pb intermetallic square nanoplates in high-quality. The Pd3Pb square nanoplates exhibited substantially enhanced ORR properties in terms of activity and durability. In particular, such nanoplates showed higher mass activity (0.62 mA μgPd−1) and specific activity (3.59 mA cm−2), which were 10.3 and 32.6 times higher than those of the commercial Pt/C, respectively, due to ligand and geometry effects. Significantly, the Pd3Pb square nanoplates/C were highly stable with 23% loss in specific activity and 21% loss in mass activity after 10 000 cycles compared to the Pd3Pb alloy dendritic nanocrystals/C (over 50% loss in specific and mass activities) due to their unique intermetallic structure with high chemical stability.
研究领域:
材料科学
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电化学
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DOI
高影响因子
Journal of Materials Chemistry A
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2021
·Vol. 9
·期 30
·16411-16417
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IF 12.732
You Xu,Mingzhen Wang,Kaili Ren,Tianlun Ren,Mengying Liu,Ziqiang Wang,Xiaonian Li,Liang Wang,Hongjing Wang
The development of efficient catalysts for electrocatalytic selective conversion of nitrate pollutants into valuable ammonia is a project of far-reaching importance. This work demonstrated the in situ electroreduction of pre-synthesized CuO nanoplates into defect-rich metallic Cu nanoplates and evaluated their electrocatalytic nitrate-to-ammonia activity. Concentrated atomic defects in the as-converted Cu nanoplates could favor the adsorption, enrichment and confinement of nitrate ions and pivotal reaction intermediates, selectively promoting eight-electron reduction (NH3 formation). Consequently, the resultant defect-rich Cu nanoplates exhibit a significant ammonia production rate of 781.25 μg h−1 mg−1, together with excellent nitrate conversion (93.26%), high ammonia selectivity (81.99%) and good electrocatalytic stability, superior to the defect-free Cu nanoplate counterpart. Isotope labelling experiments demonstrated that the source of ammonia was from nitrate. Both 1H NMR and colorimetric methods were used to quantify the ammonia yield.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2023
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IF 4.4
Haibo He,Juan Huang,Qian Wang,Xiaojing Si,Xiaoxia Yan,Yunyi Lei,Hongbo Li,Liqiang Luo
In this study, a method for ultrasensitive sensing of Fe 2+ based on Fenton reaction mediated etching of triangular gold nanoplates (Au NPLs) was developed. In this assay, the etching of Au NPLs by H 2 O 2 was accelerated in the presence of Fe 2+ due to the generation of superoxide free radical (O 2 · - ) via Fenton reaction . With the concentration of Fe 2+ increased, the shape of Au NPLs changed from triangular to sphere with the blue shifted localized surface plasmon resonance, accompanying a series of consecutive color changes from blue, bluish purple, purple, reddish purple and finally to pink. The rich color variations enable rapid visual quantitative determination of Fe 2+ within 10 min. A good linear relationship between the peak shifts and the concentration of Fe 2+ was obtained in the range of 0.035 to 1.5 μM (R 2 = 0.996). Favorable sensitivity and selectivity in the presence of other tested metal ions were achieved in the proposed colorimetric assay. The detection limits (3ơ/ k ) for Fe 2+ was 26 nM by UV–vis spectroscopy, and the clearly discernible concentration of Fe 2+ was as low as 0.07 μM by naked eyes. The recoveries of fortified samples in pond water and serum samples ranged from 96% to 106% with interday relative standard deviations <3.6% in all cases, demonstrating the applicability of the assay for measuring Fe 2+ in real samples.
研究领域:
分析化学
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纳米技术
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环境科学
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DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2020
·Vol. 187
·期 4
·1-9
·
IF 6.232
Wang Qian,Peng Ruifeng,Wang Yishan,Zhu Shouzhe,Yan Xiaoxia,Lei Yunyi,Sun Youbao,He Haibo,Luo Liqiang
A triangular gold nanoplate (AuNPL)–based colorimetric assay is presented for ultrasensitive determination of cupric ions (Cu 2+) and mercuric ions (Hg 2+ ) in sequence. AuNPLs were found to be etched efficiently when producing triiodide ions (I 3 − ) by a redox reaction between Cu 2+ and iodide ions (I − ), leading to a change of the shape of AuNPLs from triangular to sphere along with a color change from blue to pink. In the presence of Hg 2+ the etching of AuNPLs was suppressed due to the consumption of I − by the formation of HgI 2 . With an increase of the concentration of the Hg 2+ a transformation from sphere to triangular in the shape of AuNPLs occurred with a color change from pink to blue. The evolution of AuNPLs from etching to anti-etching state by sequential addition of Cu 2+ and Hg 2+ was accompanied with color variations and band shifts of localized surface plasmon resonance (LSPR), allowing for visual and spectroscopic determination of Cu 2+ and Hg 2+ successively within 15 min. In the range 0.01–1.5 μM for Cu 2+ and 0.02–3.0 μM for Hg 2+ , the linear relationship between the band shift values and the target ions concentration was found good ( R 2 > 0.996). The limit of detections (3S/k) was 19 nM for Cu 2+ and 9 nM for Hg 2+ , respectively. The lowest visual estimation concentration was 80 nM for both Cu 2+ and Hg 2+ through the distinguishable color changes. This system exhibited desirable selectivity for Cu 2+ and Hg 2+ over other common ions tested. The method has been successfully applied to sequential determination of Cu 2+ and Hg 2+ in real water and food samples.
Scheme 1 Schematic illustration for sequential detection of Cu 2+ and Hg 2+ based on etching of AuNPLs
研究领域:
分析化学
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纳米科技
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环境科学
✓ 已验证
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2021
·
IF 7.46
Chunhong Zhang,Xiangkui Jiang,Fuhua Yu,Yang Liu,Qi Yue,Peng Yang,Yongchun Liu
The noble metal nanoparticles-based colorimetric detection can simply determine the concentration of the substances by naked eyes, but difficultly resolve the conflict between sensitivity and anti-interference ability. Herein, a triangular silver nanoplates (TSNPs)-based anti-etching colorimetric detection method for analyzing thiram was proposed by regulating the antagonistic action between the protection of thiram and the etching of I − on TSNPs . The internal mechanism of etching induced peak shift of TSNPs was revealed by the discrete dipole approximation method. The effect of thiram and I − on the color of TSNPs was systematically studied. As a consequence, this method not only shows a limit of detection of 19.7 nM in the linear range of 0.025−0.35 μM by absorption spectroscopy, but also produces sensitive color changes for the detection by naked eyes. Especially, it shows good selectivity that can resist the interference of other substances including other pesticides and halide ions in the specimens. It also shows excellent applicability in the detection of thiram residues in soil. This work provides a potential device-free strategy for the application of colorimetric detection in specimens with lots of interfering substances.
研究领域:
分析化学
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环境科学
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DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
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2022
·
IF 5.999
Lei Zhan,Chun Mei Li,Zhi Feng Fu,Hong Yan Zou,Cheng Zhi Huang
Development of rapid, sensitive, and selective method for pathogenic bacteria detection is of great importance for food safety, medical diagnostic, and environmental monitoring. Currently, most techniques for low numbers of bacteria detection require advanced instrumentation or skilled operators. Herein, we present a facile colorimetric detection platform for bacterial detection using Ag nanoplates as chromogenic substrate, which takes advantages of the high specificity and affinity of aptamer and the ability of catalase to hydrolyze H 2 O 2 that can etch Ag nanoplates. By introducing catalase to the sandwich structure composed by dual-aptamer recognition strategy, bacteria detection signal is converted to the peak shift of LSPR and colorimetric change. This proposed method allows a fast naked-eye detection of S. aureus at the concentration of 60 CFU/mL based on the combination of streptavidin-biotin system and inherent sensitivity of plasmonic Ag nanoplates. Owing to the high selectivity and sensitivity, as well as the low-cost and good adaptability, this plasmonic assay is expected to be suitable for pathogenic bacteria detection in resource-limited settings.
研究领域:
生物化学
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医学诊断
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食品安全
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DOI
PubMed
高影响因子
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