SYNTHETIC METALS
·
2017
·
IF 2.435
Peng Kong,Rui Wang,Chen Zhang,Zhongjie Du,Hangquan Li,Wei Zou
A novel strategy for synthesizing a quantum dot (QD)-sensitized silver nanowire (AgNW) nanocomposite has been reported. 4-aminothiophenol (PATP) functionalized quantum dots (QDs-PATP) were prepared using the thiol ( SH) end of PATP molecules strongly bound to the surface of QDs via a ligand exchange technique. AgNWs could bind to the remaining amino group ( NH 2 ) of PATP via self-assembly techniques, and quantum dot-sensitized silver nanowires were then formed. The nanocomposite is denoted as QDs-PATP@AgNWs. The photovoltaic properties of a quantum dot-sensitized solar cell (QDSSC) based on QDs-PATP@AgNWs were investigated. Under AM 1.5 illumination, the QDSSC reached a peak conversion efficiency of 3.34%. This finding suggests that QDs-PATP@AgNWs had potential applications as a photoanode for QDSSC.
研究领域:
材料科学
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纳米技术
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2016
·Vol. 4
·期 31
·7472-7477
·
IF 5.066
Yongqiang Dong,Qian Wang,Lisi Wan,Xu You,Yuwu Chi
A simple method has been developed for the preparation of silver nanoparticles/carbon based quantum dot nano-hybrids (AgNPs@CDs). First, the small-sized CDs with abundant oxygen-containing functional groups adsorbed Ag+ ions through ion exchange or coordination reactions. Then, during the reaction with NaBH4, the Ag+ ions were reduced to AgNPs while the oxygen-containing functional groups were partially removed from the CDs. Thus, CDs were coated on the surfaces of the resultant AgNPs, leading to the formation of AgNPs@CDs. The residual oxygen-containing groups on the CDs made the obtained AgNPs@CDs possess excellent dispersivity and long-term stability in water. The synthesized AgNPs@CDs showed high surface-enhanced Raman scattering (SERS) activity and provided a sensitive SERS sensing ability for 4-aminothiophenol, with a wide dynamic range from 1 × 10−10 to 1 × 10−5 M and a low detection limit (S/N = 3) of 5.0 × 10−11 M.
研究领域:
材料科学
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分析化学
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Jiaqi Chen,Ting Zhong,Xi Lu,Feng Zhao,Pan Wang,Xue Yu,Yuxin Yang,Fengyun Sun,Xiaochun Wu,Wei Feng
Nitrite (NO2–) in water and food is a potential threat to human health. The determination of nitrite content is very significant for people’s life safety. Here, 4-aminothiophenol (4-ATP)-modulated silver growth on gold nanospheres (GNSs) was designed to detect nitrite. It was verified that the exposed amino groups of 4-ATP molecules on GNSs can accelerate Ag overgrowth. On the contrary, the deamination reaction of 4-ATP with nitrite can reduce the Ag overgrowth rates. 4-ATP modified on GNSs can not only increase the spectrophotometry response of nitrite with a low limit of detection (LOD = 36 nM) but also obtain a wide and flexible detection range (0–60 μM). In addition, this method showed good selectivity to nitrite. The excellent optical response, the sharp contrast between the acceleration and deceleration of Ag growth, and the customizable basic setting of the sensing ligands can provide a universal design scheme for high-performance detection methods.
研究领域:
分析化学
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纳米技术
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2014
·Vol. 16
·期 28
·14706-14712
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IF 4.198
Xuan He,Hui Wang,Zhongbo Li,Dong Chen,Qi Zhang
An efficient and green approach was used to fabricate novel and low-cost surface-enhanced Raman scattering (SERS) spectroscopy sensors based on 4-aminothiophenol (4-ATP) functionalized ZnO–Ag hybrid nanoflowers for the detection of explosives. Such SERS sensors exhibited high sensitivity to rhodamine 6G (R6G) at a low concentration of 10−12 M and an enhancement factor of over 4.12 × 106 was achieved. Moreover, the Raman-inactive trinitrotoluene (TNT) initiated the high Raman scattering of non-resonated 4-ATP through the formation of a π-donor–π-acceptor interaction between the π-acceptor, TNT, and the π-donor, the 4-ATP–Ag–ZnO complex, on the flower-like hybrids. Because this π-donor–π-acceptor interaction could effectively induce the “hot spots” for SERS, TNT concentrations as low as 5 × 10−9 M could be detected. Furthermore, other derivatives of TNT were also explored, and this sensor exhibited better selectivity for TNT than other similarly structured explosives. The low-cost hybrid SERS substrates presented good sensitivity and reproducibility for the analytes employed, demonstrating promising application in forensic science and homeland security.
研究领域:
材料科学
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化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Plasmonics
·
2024
·
IF 3.3
Cui Jiahao,Han Xue,Shi Guochao,Li Kuihua,Zhou Wenying,Li Zelong,Yu Zengshan,Wang Mingli
Surface-enhanced Raman scattering (SERS) sensors are ideal for point-of-care testing (POCT) of disease markers; the key to practical applications lies in their quantitative detection capabilities and high sensitivity. In this study, We propose a simple method to develop a high-sensitivity composite SERS substrate using physical vapor deposition (PVD) technology. This SERS substrate, utilizing 4-aminothiophenol (4-ATP) as the detection molecule, demonstrated a high enhancement factor (~ 10 6 ) and a low detection limit (10 −10 M). The corrected linearity problem achieved good linear correlation ( R 2 = 0.988) by using 4-ATP. In the trace detection process of creatinine, when creatinine is dissolved in goat serum solution diluted 1000 times, there is still a clear SERS signal at the characteristic peak when the concentration is only 10 −4 g/l, further demonstrating the potential of SERS sensors in the detection of renal disease biomarkers.
研究领域:
生物医学工程
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2025
·
IF 6.1
Lianyu Bao,Fei Zhou,Ye Liu,Botian Wang,Rang Chu,Qingmao Zhang,Hongcheng Wang
Monitoring chemical reaction processes is of great significance in the study of the reaction mechanisms, and the optimization or control of reaction conditions. In this work, we demonstrate a novel monitoring method of chemical reactions using fiber SERS probes. The high-performance fiber SERS probes are prepared by the laser-induced evaporation self-assembly method (LIESAM), where lots of Au-nanorod clusters are deposited on the fiber facet for providing large SERS enhancement factor and good hot electron catalytic property. The remote and in-situ monitoring of chemical reactions is achieved through simply dipping the probes into the reaction solution. Taking the classic reduction reaction from 4-nitrothiophenol (4-NTP) to 4-aminothiophenol (4-ATP) by sodium borohydride (NaBH 4 ) as an example, the time-resolved SERS spectra collected by probes clearly reflect the reduction procedure of the disappearance of 4-NTP, the formation of intermediate product 4,4′-dimercaptoazobenzene (4,4′-DMAB) and the emergence of the final product 4-ATP. In addition, a new Raman peak at 1366 cm −1 is observed when the 4-NTP is reduced in an H 2 atmosphere generated by the hydrolysis of NaBH 4 , corresponding the formation of a new intermediate product 4-nitrosothiophenol (4-NSTP). Also, the monitoring of the oxidation reaction from 4-ATP to 4,4′-DMAB is demonstrated using fiber SERS probes. Considering that all the SERS spectra are acquired with a portable Raman spectrometer and the fiber has a very low transmission loss, this work provides a good platform for remote, on-site and in situ monitoring of chemical reactions in liquid environments and thus finds important applications in scientific research and industrial scenarios.
研究领域:
化学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2020
·
IF 3.232
Zhiming Guo,Alberta Osei Barimah,Chuang Guo,Akwasi A. Agyekum,Viswadevarayalu Annavaram,Hesham R. El-Seedi,Xiaobo Zou,Quansheng Chen
Black tea like other food crops is prone to mercury ion (Hg 2+ ) contamination right from cultivation to industrial processing. Due to the dangerous health effects posed even in trace contents, sensitive detection and quantification sensors are required. This study employed the surface-enhanced Raman scattering (SERS) enhancement property of 4-aminothiophenol (4-ATP) as a signal turn off approach functionalized on Ag-Au alloyed nanoparticle to firstly detect Hg 2+ in standard solutions and spiked tea samples. Different chemometric algorithms were applied on the acquired SERS and inductively coupled plasma-mass spectrometry (ICP-MS) chemical reference data to select effective wavelengths and spectral variables in order to develop models to predict the Hg 2+ . Results indicated that Ag-Au/4-ATP SERS sensor combined with ant colony optimization partial least squares (ACO-PLS) exhibited the best correlation efficient and minimum errors for Hg 2+ standard solutions (R c = 0.984, R p = 0.974, RMSEC = 0.157 μg/mL, RMSEP = 0.211 μg/mL) and spiked tea samples (R c = 0.979, R p = 0.963, RMSEC = 0.181 μg/g and RMSEP = 0.210 μg/g). The limit of detection of the proposed sensor was 4.12 × 10 −7 μg/mL for Hg 2+ standard solutions and 2.83 × 10 −5 μg/g for Hg 2+ spiked tea samples. High stability and reproducibility with relative standard deviation of 1.14% and 0.84% were detected. The potent strong relationship between the SERS sensor and the chemical reference method encourages the application of the developed chemometrics coupled SERS system for future monitoring and evaluation of Hg 2+ in tea.
研究领域:
分析化学
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环境科学
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食品科学
✓ 已验证
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2018
·Vol. 185
·期 2
·1-8
·
IF 5.705
Chen Ying-Chu,Hsu Jui-Hung,Hsu Yu-Kuei
This study introduces a two-step method for the deposition of branched silver nanowires (AgNWs) on fluorine-doped tin oxide (FTO) glass. This material serves as both an active surface-enhanced Raman-scattering (SERS) substrate and as an enzyme-free electrochemical sensor for H 2 O 2 . This dual functionality is systematically studied. The AgNWs as the main trunk were first deposited on FTO by spray-coating. Silver branches were then electrochemically produced on the preformed NWs. Scanning electron microscopy, X-ray diffraction and X-ray photoelectron spectrometry were employed to characterize morphology, composition and microstructure. SERS experiments show that the branched AgNW/FTO substrate exhibits excellent performance in detecting 4-aminothiophenol at an ultra-low concentration of 0.1 fM. Simultaneously, this material displays an excellent electrocatalytic response to H 2 O 2 reduction at a concentration as low as 1 μM. The sensor has a rapid response and two linear analytical ranges that extend from 0.25 to 300 μM, and from 0.3 to 2.6 mM of H 2 O 2 , respectively. The ultrahigh sensitivity and satisfactory reproducibility highlights the merit of this hierarchical AgNW dendritic structure for sensing applications.
Branched silver nanowires can serve as both an active surface-enhanced Raman scattering substrate and as an electrochemical sensor for H 2 O 2 . This dual functionality is systematically investigated.
研究领域:
材料科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Zhen-Fei Tian,Jing-Xuan Pei,Xiang Yu,Yi-Bo Sun,Lei Yang
4-Aminothiophenol (4-ATP, a toxic pesticide intermediate) residues in waste water endanger water ecology and human health. Therefore, the development of reliable surface-enhanced Raman scattering (SERS) substrate is a promising strategy for monitoring and preventing 4-ATP pollution. In this work, a core-shell structured Ag@ZnS hybrid, consisting of Ag nano-core and ZnS nano-shell, was fabricated and employed as a SERS substrate to detect 4-ATP. Owing to the specific core-shell structure, epy as-prepared Ag@ZnS substrate is stable against oxidation and spontaneous agglomeration of Ag NPs, enjoying good stability and uniform hot spots. Moreover, the formation of heterostructure between Ag-core and ZnS-shell offered a remarkable chemical enhancement for the Raman signals. The optimized Ag@ZnS substrate showed high sensitivity for rhodamine 6 G (R6G, 10 −9 M) and methylene blue (10 −8 M) probes, as well as 4-ATP (10 −8 M) target analyte. Likewise, the superior reproducibility (RSD<5.50 %, n = 16) and good stability (79.5 % of initial strength after 28 days) for 4-ATP makes this substrate a good candidate for actual determination of trace 4-ATP. This work proposes a strategy to fabricate a reliable SERS substrate with high sensitivity and superior reproducibility, and the designed Ag@ZnS substrate may be applicable to monitor 4-ATP residues in wastewater.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Xiuting Li,Hongmei Liu,Chenjie Gu,Jinjie Zhang,Tao Jiang
The acquisition of a robust plasmonic substrate with both appreciable molecule anchoring and quantitative detection features is a prerequisite for the reliable adhibition of surface-enhanced Raman scattering (SERS) technology. Herein, an innovative sophisticated SERS substrate was proposed by spin-coating titanium dioxide (TiO 2 ) onto a flexible polydimethylsiloxane (PDMS) film followed by the modification of triangular silver (Ag) nanoplates through in-situ reduction. The absence of organic surfactants during this process rendered the substrate great opportunity in effectively enriching molecules and the assembly of TiO 2 and Ag made it a reusable and sensitive SERS platform. After a recyclable monitoring of 4-aminothiophenol (4-ATP) with different concentrations was carried out by reusing the hybrid substrate for 8 cycles, a limit of detection as low as 1.58 × 10 −9 M was achieved. The distinctive intrinsic Raman signal from PDMS matrix was further verified to successfully correct the poor detection linearity by serving as internal standard and the coefficient of linear correlation (R 2 ) was improved from 0.967 to 0.997. In this regard, the as-prepared multifunctional PDMS/TiO 2 /Ag hybrid substrate with simulation-estimated electromagnetic “hot spots” exhibited remarkable quantitative recyclable detection performance.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2016
·
IF 4.836
Dan Chen,Huining Zhang,Kai Yang,Hongyu Wang
In this work, 4-aminothiophenol and 3-aminopropyltriethoxysilane were firstly used to functionalize graphene oxide (GO) in order to promote the sorption efficiencies of methylene blue (MB) and copper (Cu 2+ ). Characterization experiments illustrated that sulfydryl group ( SH) and amino group ( NH 2 ) were existed onto 4-aminothiophenol modified GO (GO-SH) and 3-aminopropyltriethoxysilane modified GO (GO-N), respectively. Adsorption isotherm results showed that the maximum adsorption capacities of MB by GO-SH and GO-N were 763.30 and 676.22 mg/g, which was much higher than original GO 455.95 mg/g. For Cu 2+ adsorption, the maximum adsorption capacities by GO-SH and GO-N were 99.17 and 103.28 mg/g, suggesting that the engineered GO exhibited greater Cu 2+ sorption ability than original GO 32.91 mg/g. Both MB and Cu 2+ removal rates increased with pH and adsorbent dosage increased, while the sorption rates weakly reduced with increasing ionic strength. The modification by SH and NH 2 would not only increase the sorption sites, but also cause chelation with heavy metals, and thus improving the sorption capacities of MB and Cu 2+ .
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2016
·Vol. 27
·期 39
·395304
·
IF 3.573
Honghua Zhang,Dilong Liu,Lifeng Hang,Xinyang Li,Guangqiang Liu,Weiping Cai,Yue Li
A facile route has been proposed for the fabrication of morphology-controlled periodic SiO2 hierarchical micro/nanostructured arrays by reactive ion etching (RIE) using monolayer colloidal crystals as masks. By effectively controlling the experimental conditions of RIE, the morphology of a periodic SiO2 hierarchical micro/nanostructured array could be tuned from a dome-shaped one to a circular truncated cone, and finally to a circular cone. After coating a silver thin layer, these periodic micro/nanostructured arrays were used as surface-enhanced Raman scattering (SERS)-active substrates and demonstrated obvious SERS signals of 4-Aminothiophenol (4-ATP). In addition, the circular cone arrays displayed better SERS enhancement than those of the dome-shaped and circular truncated cone arrays due to the rougher surface caused by physical bombardment. After optimization of the circular cone arrays with different periodicities, an array with the periodicity of 350 nm exhibits much stronger SERS enhancement and possesses a low detection limit of 10−10 M 4-ATP. This offers a practical platform to conveniently prepare SERS-active substrates.
研究领域:
材料科学
·
纳米技术
·
光学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）