APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Wangfan Yang,Jiangwei Lu,Wenbo Zhuang,Jianfei Qi,Chunyang Wang,Huachao Wang,Guowen Su,Kai Xiong,Yong Mao,Xiaoxia Gong,Jun Yuan,Dengke Wang,Jiehe Sui,Genlin Zhang,Yanfen Wan,Peng Yang
Metamaterials are electromagnetic materials with engineered sub-wavelength structures, which can be coupled with the incident electromagnetic wave to produced peculiar physical properties. Currently, many studies are being conducted to the transition metal dichalcogenides (TMDs) due to their unique structures and novel physical properties. Here, we produced honeycomb nanostructure with various sizes on few-layer PtS 2 through a well-developed nanosphere lithography technology. In this way, the unique properties of PtS 2 metamaterials can be tuned to explore more exotic physical characteristics. The honeycomb surface morphology of PtS 2 metamaterials has been demonstrated using the scanning electron microscope and the atomic force microscope. The optical absorption spectra of Pt and PtS 2 metamaterials were investigated and the results show that the absorption spectra can be modulated by changing the size of the nanostructure . In addition, the optical anisotropic properties of Pt and PtS 2 metamaterials were characterized through the angle-resolved absorption spectra. Raman spectroscopy shows the surface-enhanced Raman spectroscopy (SERS) effect of Pt metamaterials. The simulation exhibits the electric field distribution of PtS 2 metamaterials at different wavelengths. The results offer a new approach to develop novel optoelectronic devices based on the meta-structure of TMDs.
研究领域:
材料科学
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2021
·
IF 4.126
Jiangwei Lu,Wenbo Zhuang,Wangfan Yang,Xudong Zhang,Guowen Su,Xiaoxia Gong,Jun Yuan,Jiehe Sui,Yingtang Zhou,Genlin Zhang,Yanfen WAN,Peng Yang
Ultrablack materials are distinguished by their extremely low reflectivity and high absorptivity, which can be used to increase photovoltaic cell efficiency, capture stray light, and design radar camouflage. Black silicon is a type of ultrablack material, the absorptivity of which still has room for improvement. Here, nanostructured black silicon is prepared by a metal-assisted chemical etching method, in which chloroauric acid (HAuCl4) acts as the catalyst. Furthermore, the study demonstrates that due to the deposition of a few layers of PtS2 the number of “hot spots” between the sidewall gaps of bamboo shoot-like protrusions is significantly increased, thereby further improving the absorption of black silicon and enhancing light suppression. The few-layer PtS2 was densely grown on the black silicon by combining the physical vapor deposition (PVD) and the chemical vapor deposition (CVD) methods. Next, the enhanced Raman property of black silicon was explored. These results provide a new idea for the manufacture of excellent photovoltaic and optoelectronic devices in which very high absorption is necessary.
研究领域:
材料科学
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光电子学
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纳米技术
✓ 已验证
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2023
·
IF 6.2
Nian Jiang,Ling Qian,Qiang Peng,Shuqi Zhang,Wanqing Yue
Hydrogen peroxide (H 2 O 2 ) is produced in living organisms and is involved in a variety of redox-regulated processes. Therefore, the detection of H 2 O 2 is important for tracing the molecular mechanisms of some biological events. Here, we demonstrated for the first time the peroxidase activity of PtS 2 -PEG NSs under the physiological conditions. PtS 2 NSs were synthesized by mechanical exfoliation followed by functionalization with polyethylene glycol amines (PEG-NH 2 ) to improve their biocompatibility and physiological stability. Fluorescence was generated by catalyzing the oxidation of o-phenylenediamine (OPD) by H 2 O 2 in the presence of the PtS 2 NSs. The proposed sensor had a limit of detection (LOD) of 248 nM and a detection range of 0.5–50 μM in the solution state, which was better than or comparable to previous reports in the literature. The developed sensor was further applied for the detection of H 2 O 2 released from cells as well as for imaging studies. The results show that the sensor is promising for future applications in clinical analysis and pathophysiology.
研究领域:
生物化学
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医学诊断
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2021
·Vol. 188
·期 5
·1-9
·
IF 5.833
Zhang Wenxian,Li Xiuping,Cui Tianyu,Li Shenchang,Qian Yuqing,Yue Yu,Zhong Wenying,Xu Bo,Yue Wanqing
Using an ultrasonication-assisted liquid exfoliation method, we have synthesized PtS 2 nanosheets with good reproducibility. Herein, intrinsic peroxidase-like activity was for the first time demonstrated for PtS 2 nanosheets, which can catalyze H 2 O 2 oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) to generate a colored solution. The catalytic mechanism of PtS 2 nanosheets was investigated, which indicated that acceleration of the electron transfer between TMB and H 2 O 2 was the main reason for the peroxidase-like activity of PtS 2 nanosheets. Based on these observations, we exploited PtS 2 nanosheets integrated into dopamine-functionalized hyaluronic acid (HA-DA) hydrogel microspheres by droplet microfluidics to construct PtS 2 nanosheet– and PtS 2 @HA-DA microsphere–based sensors for highly sensitive determination of H 2 O 2 . When coupled with glucose oxidase, we further developed two glucose sensors based on the above two methods. Among them, the linearity of the PtS 2 nanosheet–based spectrophotometry was in the range of 0.5 to 150 μM and the limit of detection as low as 0.20 μM. The linearity of the microsphere-based colorimetry was in the range 200 to 12,000 μM with a detection limit of 29.95 μM. Both of the glucose sensors can be applied to the determination of glucose in human serum with reliable results and reproducibility. Graphical abstract
研究领域:
纳米技术
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生物化学
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分析化学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today Physics
·
2021
·
IF 9.298
J. Lu,X. Zhang,G. Su,W. Yang,K. Han,X. Yu,Y. Wan,X. Wang,P. Yang
At present, the research in field of the transition metal dichalcogenides (TMDs) was mostly concentrated in the group 6 TMDs such as MoS 2 and WS 2 for numerous applications like optoelectronics , sensing and so on. However, our research focuses on the group 10 of TMDs, which is relatively unexplored. Platinum disulfide (PtS 2 ), a typical representative of the group 10 TMDs, is a newly developed two-dimensional materials with high carrier mobility , widely tunable bandgap, and ambient stability for electronic and optoelectronic applications. Here, we experimentally and theoretically investigate the synthesis, structure and physical properties of the few-layer PtS 2 . A inch scale of few-layer PtS 2 was synthesized by direct sulfurization of Pt metal sputtered on the SiO 2 /Si substrate in a Plasma Enhanced Chemical Vapor Deposition (PE-CVD) furnace. And the electronic band structure of layered PtS 2 was obtained by density function theory (DFT). A series of characterizations including Raman spectroscopy , Photoluminescence (PL), atomic force microscopy (AFM), scanning electron microscope (SEM), high-resolution transmission electron microscope (HR-TEM) and X-ray photoelectron spectroscopy (XPS) have demonstrate the quality and uniformity of the few-layer PtS 2 as prepared. Moreover, the field-effect transistor (FET) was fabricated based on PtS 2 in order to investigate their electronic properties, which show a p-type semiconductor behavior. Further, the work function and potential difference of the PtS 2 on the SiO 2 /Si substrate were measured by Kelvin probe force microscopy (KPFM), showing 32 meV and 36 mV, respectively. The few-layer PtS 2 samples were treated with oxygen plasma to investigate the Raman transforms, exhibiting the reduction of Raman intensity after treatment due to oxidation . The idea that this synthesis strategy can also be applied to other PtX 2 devices are speculated to promote the application of TMDs in advanced optoelectronic devices.
研究领域:
材料科学
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
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