ACS Applied Electronic Materials
·
2025
·
IF 4.7
Yinyin Song,Zida Zheng,Dianyi Liu
Inorganic metal chalcogenides, such as Ag2S, are well-known for their high absorption coefficient, high carrier concentration, and excellent carrier transport properties. Ag2S exhibits strong light absorption spanning from ultraviolet (UV) to near infrared (NIR), making it highly promising for photoelectric applications. In this study, Ag2S thin films with good crystallinity and near-stoichiometric composition were prepared via the thermal evaporation process. These films demonstrated high absorption coefficient, excellent carrier mobility and high carrier concentration. The Ag2S-based photodetector was prepared and exhibited a broadband photoresponse ranging from 350 to 1200 nm, covering both UV and NIR regions. The semitransparent Ag2S photodetector was further developed and employed to consrtuct a high-resolution wavelength recognition system. Experimental results revealed an impressive wavelength measurement resolution of 1 nm, highlighting its potential for integration into miniature spectrometers.
研究领域:
材料科学
·
光电子学
·
半导体物理
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纳米材料
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传感技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2018
·Vol. 20
·期 1
·1-13
·
IF 2.127
Wu Jie,Zhou Yifeng,Nie Wangyan,Chen Pengpeng
This paper reported a one-step synthesis of Ag 2 S/Ag@MoS 2 nanocomposites and its applications in the surface-enhanced Raman scattering (SERS) detection and photocatalytic degradation of organic pollutants. The nanocomposites were well characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), cyclic voltammograms (CV), the Brunauer-Emmett-Teller (BET), and Fourier transforms infrared spectra (FTIR). The AgNPs were uniformly dispersed on the MoS 2 nanosheets and the particle size of the AgNPs was about 10–30 nm. These Ag 2 S/Ag@MoS 2 nanocomposites offered sensitive SERS signals for the detection of R6G with the limit of detections as low as 10 −10 M. The photocatalytic activity of the composite catalyst was studied by the degradation of methylene blue (MB) dye under light illumination. The apparent rate constant of MB degradation for the obtained catalyst could reach 6.6 × 10 −2 min −1 , indicating that the novel Ag 2 S/Ag@MoS 2 nanocomposites can be explored for organic pollutant’s detection and degradation.
One-step synthesis of Ag 2 S/Ag@MoS 2 nanocomposites for SERS and photocatalytic applications
研究领域:
材料科学
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环境科学
·
化学
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产品关联
DOI
高影响因子
JOURNAL OF FLUORESCENCE
·
2016
·Vol. 27
·期 1
·227-233
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IF 1.601
Yan Dan,He Yu,Ge Yili,Song Gongwu
A novel fluorescence method for sensitive and selective detection of phosphate was developed based on near infrared emission Ag 2 S QDs/ Metal − Organic Shell Composite via the deposition of metal-organic (zinc-nitrogen) coordination shell around Ag 2 S QDs . Under optimal conditions described, the fluorescence intensity of the composite was decreased at 685 nm in the presence of phosphate, which was linearly related to the concentration of phosphate in the range of 0. 7 to 4.2 μM and 11.2 to 88.2 μM with the relative correlation coefficient of R 2 = 0.998 and 0.987 respectively and detection limit as low as 6 nM. In addition, the proposed method was successfully utilized in serum samples, tap water and Yangtze River water samples with the recoveries ranged from 94.76 to 100.86 %, which presaged more opportunities for application in related bioassay and water sample researches.
研究领域:
分析化学
·
环境科学
·
生物医学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Hong Chen,Yan Lei,Xiaogang Yang,Chaoliang Zhao,Zhi Zheng
The recombination of photoinduced charge carriers is detrimental to the photovoltaic performance of solar cells. In this work, we used CdS as an under-layer to reduce the recombination of photoinduced charge carriers at the Ag 2 S/FTO (F-doped SnO 2 ) interface. The CdS under-layer was deposited onto an FTO substrate using a facile chemical bath deposition (CBD) method. By controlling the thickness of the CdS film between Ag 2 S and FTO, the recombination of photoinduced charge carriers was successfully suppressed. The effect of the CdS under-layer on the charge carrier recombination was carefully evaluated by transient surface photovoltage (TSPV) measurements, electrochemical impedance spectroscopy (EIS) and a photoelectrochemical method. The power conversion efficiency (PCE) of solar cell devices with a 40 nm CdS under-layer is 1.16%, which is ~52% enhancement compared to those of FTO/Ag 2 S-based solar cell devices. Our work may provide a useful strategy to suppress photoinduced charge carrier recombination at the electrode and absorber semiconductor interface.
研究领域:
材料科学
·
光伏技术
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 32
·期 5
·2106854
·
IF 18.808
Ying Liu,Jing Liu,Qinghua Zhang,Qinshu Zhu,Xinhe Liu,Zhaoyin Wang,Zhihui Dai
Promotion of the photoelectric (PE) response is of great importance for improving performances of solar cells, photocatalysis and photoelectrochemical (PEC) sensing. Herein, advanced CuO/Ag 2 S/CuS nanohybrids (NHs) are developed in which the CuO/Ag 2 S NHs have superior PE properties while the CuS nanoparticles own notable photothermal (PT) feature. Under illumination of 850 nm light, the CuO/Ag 2 S NHs are in-situ heated by the PT effect of CuS, which significantly facilitates carrier generation and migration, thus eventually increasing related PE response by 1.4 times with a PT contribution percentage of 34.3% to the total photocurrent. Based on this PT-promoted PE mechanism together with an enzymatic catalysis-induced Cu species regulation, a bio-friendly PEC sensing platform is established, realizing the sensitive determination of inorganic pyrophosphatase with a broad detection range from 0.05 to 35 mU ml −1 and a low detection limit of 0.02 mU ml −1 . In particular, further variable temperature tests show that this PT effect is even capable of shrinking the band gap of CuS (from ≈2.1 to ≈1.3 eV), expanding the wavelength range of adoptable excitation light, thereby being beneficial for biological applications. In comparison with other methods, promotion of PE response with PT effect has few restrictions on photoactive materials, and is therefore valuable to various PE-relevant applications.
研究领域:
材料科学
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生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2016
·
IF 4.758
Dan Yan,Yu He,Yili Ge,Gongwu Song
A novel fluorescence “turn on-off” method for sensitive and selective detection of heparin and heparinase I was developed based on near infrared Polyethyleneimine Capped Ag 2 S Quantum Dots (PEI-Ag 2 S QDs). The fluorescence “turn-on” arose from aggregation-induced emission enhancement (AIEE) characteristics of PEI-Ag 2 SQDs induced by electrostatic interaction between PEI-Ag 2 SQDs and heparin. Heparinase I, which can specifically hydrolyze heparin into short fragments would de-aggregate PEI-Ag 2 S QDs/heparin system and lead to fluorescence “turn-off”. Under optimal conditions described, the fluorescence enhancement at 685 nm was linearly related to the concentration of heparin and heparinase I in the range of 0.069–2.275 μM and 0–103 ng mL −1 with the relative correlation coefficient of R 2 = 0.997 and 0.99 and detection limit as low as 6 nM and 0.5 ng mL −1 , respectively. The activity of the heparinase I was further investigated using steady-state kinetic for the reaction. In ddition, the proposed method was successfully utilized in serum samples, which presaged more opportunities for application in related biochemical and biomedical researches.
研究领域:
生物化学
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医学检测
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2020
·
IF 5.977
Yu Wang,Qin Lei,Wanxin Dong,Xinxin Mo,He Li
In this work, a multicolor visual immunoassay platform was developed. The photoelectric effects of Ag 2 S NPs@ZnO NTs made the color changes of PANI/PB, which enabled visual inspection of CEA. Under the visible light excitation, Ag 2 S NPs@ZnO NTs generates electron-holes. Where, photoelectrons will pass electrical circuit to PB and photoinduced holes will oxidize PANI, which making the PANI/PB composite changes from emerald green-blue-purple-black colors. When CEA was incubated, the migration rate of photogenerated carriers is slowed down owing to the steric hindrance , resulting in different color changes of PANI/PB. In addition, the average green channel of PANI/PB read by photoshop has a certain correlated linear relationship with the concentration of CEA. Meanwhile, we can observe the color transformation of PANI/PB with our own eyes. By integrating advantages of photoelectrochemistry and colorimetry , the linear range of CEA detection was 0.1–20 ng/mL, and the detection limit was 0.05 ng/mL (S/N = 3). More importantly, this multicolor sensing method is very convenient, simple and low-cost. The photocarriers-modulated colorimetric strategy also provides a novel idea for visual portable platform design in clinical diagnosis.
研究领域:
生物医学工程
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分析化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 54
·期 4
·3174-3186
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IF 2.993
Yuan Ling,Lu Shuangwei,Yang Feng,Wang Yushu,Jia Yongfang,Kadhim Mayameen S.,Yu Yanmei,Zhang Yong,Zhao Yong
Morphology is a crucial factor in determining the chemical, optical, and electrical properties of nanoscale materials. In this work, we utilized a facile room-temperature deposition method to synthesize three-dimensional (3D) coral-like Ag 2 S nanostructures. The formation mechanism of 3D coral-like Ag 2 S nanostructures was proposed by tracking the reaction process. In comparison with 0D Ag 2 S nanoparticles and 1D Ag 2 S nanowires of similar size, 3D coral-like Ag 2 S nanostructures exhibit higher pore volume, photocatalytic activity and cyclic stability for degradation of methyl orange (MO). Surface photovoltage measurement, electrochemical impedance spectroscopy, and Mott–Schottky analysis showed that compared to other Ag 2 S nanostructures, 3D coral-like Ag 2 S nanostructures have the strongest surface photovoltaic response, longest carrier lifetime, and highest carrier density.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2019
·Vol. 26
·期 12
·12237-12246
·
IF 2.914
Yang Mi,Shi Xianyang
Biosynthesized nanocomposites are attracting growing interests because they are environmentally friendly. Ag 2 S nanoparticles (Ag 2 S NPs) are deposited in situ on the surfaces of TiO 2 nanotubes (TNTs) via Shewanella oneidensis MR-1 to form Ag 2 S/TNT nanocomposites. The prepared Ag 2 S/TNTs nanocomposites are characterized using high-resolution transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and energy-dispersive X-ray spectroscopy. The results show that Ag 2 S NPs smaller than 8 nm are successfully synthesized and fabricated on the TNT surfaces with relatively uniform distribution. The catalytic performance of the Ag 2 S/TNT nanocomposites is evaluated for catalytic reduction in the presence of NaBH 4 and the photocatalytic degradation of 4-nitrophenol (4-NP) under visible light. The Ag 2 S/TNT nanocomposites show excellent catalytic activity and good stability in the 4-NP reduction process. The 4-NP degradation ratio reaches 98.3% in 50 min, and 87% conversion was achieved after eight cycles. The Ag 2 S/TNT nanocomposites also exhibit excellent photocatalytic activity for 4-NP at a rate of 0.69 h −1 , and the complete degradation of 4-NP was observed within 5 h. Therefore, this study offers an environmentally friendly approach to synthesize nanocomposites for practical applications.
研究领域:
环境科学
·
纳米生物学
·
催化化学
✓ 已验证
DOI
PubMed
高影响因子
Acta Biomaterialia
·
2020
·
IF 7.242
Yaping Zhong,Yibiao Zou,Lingyan Liu,Ruohan Li,Fengfeng Xue,Tao Yi
Heat-treated cancer cells have thermo-resistance due to the up-regulated levels of heat shock proteins (HSP) resulting in low therapeutic efficiency and ineffective ablation of tumors. In this work, we report pH-responsive Ag 2 S nanodots (Ag 2 S NDs) loaded with HSP70 inhibitor (QE-PEG-Ag 2 S) for enhanced photothermal cancer therapy. QE-PEG-Ag 2 S was easily prepared via self-assembly of hydrophobic Ag 2 S NDs, amphiphilic pH-responsive PEG 5k -PAE 10k polymer, and an HSP70 inhibitor quercetin (QE). QE-PEG-Ag 2 S has ideal water-solubility and biocompatibility, can rapidly enter cells, and preferentially accumulate in cell lysosomes . The slightly acidic environment of tumor cells and the acidity of lysosomes as well as the high temperature generated by photothermal therapy under irradiation of NIR light (808 nm) promote the release of the inhibitor molecules to reduce the heat resistance of cancer cells and improve the in vivo photothermal therapy efficiency. Moreover, QE-PEG-Ag 2 S has good photoacoustic imaging (PAI) ability; this QE-PEG-Ag 2 S concentration dependent signal can precisely follow the accumulation of the nanomaterials in tumors and dictate the correct time for light therapy. As a result, QE-PEG-Ag 2 S achieved complete tumor ablation effect with no recurrence when only irradiated with NIR light for 10 min. This approach offers a new approach for the theranostic applications of Ag 2 S NDs. Statement of Significance In this work, pH-responsive Ag 2 S nanodots loaded with the heat shock protein inhibitor for enhanced photothermal cancer therapy have been simply prepared via self-assembly process. This nanoagent possesses ideal water-solubility and biocompatibility, can rapidly enter cells, and preferentially accumulate in cell lysosomes. The acidic environment of tumor cells and the acidity of lysosomes, as well as the high temperature generated by photothermal therapy under irradiation of NIR light promote the release of the inhibitor molecules from the nanoagent to improve the in vivo photothermal therapy efficiency. Moreover, the photoacoustic imaging (PAI) of the nanoagent can precisely follow the accumulation of the nanomaterials in tumors and dictate the light therapy time to guarantee the complete tumor ablation effect with no recurrence.
研究领域:
肿瘤学
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纳米医学
·
生物材料学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CATALYSIS LETTERS
·
2024
·Vol. 154
·期 11
·6157-6167
·
IF 2.3
Yang Cuina,Wu Jun
The separation of photo-generated carriers in heterojunctions plays a crucial role in regulating the built-in electric field. The design of materials with directional migration characteristics inside the bulk phase and at the interface between the two phases is of great significance for studying photocatalytic hydrogen evolution. The P-CdS/Ag 2 S composite photocatalytic system prepared in this study was doped with P element by heating CdS and NaH 2 PO 2 in a muffle furnace, resulting in the directed migration of photo-generated charges in the prepared sample driven by an internal electric field. By in-situ deposition of Ag 2 S on the surface of P-CdS, a Janus heterojunction was prepared to enhance the transfer of charge carriers at the phase interface. The hydrogen evolution rate of P-CdS/Ag 2 S is 12.44 mmol·h −1 ·g −1 , which is 30 times higher than that of the previously prepared pure CdS sample (0.411 mmol·h −1 ·g −1 ). This significant improvement in photocatalytic performance is attributed to the doping of P element and the in-situ loading of Ag 2 S co-catalyst, which together promote the effective separation and transport of photogenerated charge carriers, thereby enhancing the photocatalytic activity of the material. This work is of great significance for exploring the charge-directed transfer problem of sulfide photocatalysts in the field of photocatalytic hydrogen evolution. Graphical
研究领域:
材料科学
·
光催化
·
纳米材料
·
能源化学
·
半导体物理
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Qing Chen,Kun Pang,Qiao Tang,Jie Huang,Qianmin Dong,Pei Liang
In order to solve the problem of poor sensitivity and selectivity of conventional SERS substrates, we synthesized Mo 1−x W x S 2 @Ag 2 S nanosheets in this paper by a two-step hydrothermal method. The structure and morphology of the synthesized Mo 1− x W x S 2 @Ag 2 S nanosheets were characterized by XRD and SEM,respectively. The results show that the Mo 1− x W x S 2 @Ag 2 S nanosheet has an irregular layered structure. Further, the SERS properties of Mo 1− x W x S 2 @Ag 2 S nanosheets were tested by using rhodamine 6G (R6G), crystalline violet (CV), and 4-mercaptobenzoic acid (4-MBA) as probe molecules, respectively. The test results demonstrated that the nanosheets were specific to R6G and CV probe molecules, and the mechanism of selectivity was due to CT enhancement. In addition, Mo 1− x W x S 2 @Ag 2 S exhibits ultrahigh sensitivity in R6G and CV, with the corresponding detection limit of both reached 10 −8 M. And linear fitting of the peak intensities was carried out, with the R 2 coefficient of 0.981 and 0.951, respectively. Finally, the relative standard deviations (RSDs) of this Mo1-xWxS2@Ag2S nanosheets was obtained to be 8.56 % by test 1 × 10 −4 M R6G at the characteristic peak 613 cm −1 , which represents excellent detection repeatability. The Mo 1− x W x S 2 @Ag 2 S nanosheets are rich in edge-active sites favorable for charge transfer, which can enhance the SERS signals of the target molecules better. Besides, the Raman detection of the surface of Mo 1− x W x S 2 @Ag 2 S nanosheets using nitrofurantoin (NFT) also reached a detection limit of 10 −8 M. Mo 1− x W x S 2 @Ag 2 S nanosheets substrates can find applications in medicine and provide new strategies for improving the SERS performance.
研究领域:
材料科学
·
分析化学
·
生物医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）