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Preparation of Hybrid Molybdenum Disulfide/Single Wall Carbon Nanotube–n-Type Silicon Solar Cells
摘要： Carbon nanotube/silicon (CNT/Si) heterojunction solar cells represent one new architecture for photovoltaic devices. The addition of MoS2 to the devices is shown to increase the e?ciency of the devices. Two structures are explored. In one case, the single wall carbon nanotubes (SWCNTs) and MoS2 ?akes are mixed to make a hybrid, which is then used to make a ?lm, while in the other case, a two layer system is used with the MoS2 deposited ?rst followed by the SWCNTs. In all cases, the solar cell e?ciency is improved largely due to signi?cant increases in the ?ll factor. The rise in ?ll factor is due to the semiconducting nature of the MoS2, which helps with the separation of charge carriers.
关键词： molybdenum disul?de (MoS2),single wall carbon nanotubes (SWCNTs),thin ?lm,solar cells
更新于2025-09-16 10:30:52
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Colorimetric Analysis of Carcinoembryonic Antigen Using Highly Catalytic Gold Nanoparticles-Decorated MoS <sub/>2</sub> Nanocomposites
摘要： Sensitive detection of carcinoembryonic antigen (CEA) is very important for early detection and cancer therapy monitoring. We utilized the highly catalytic activity of MoS2-gold nanoparticles (MoS2-AuNPs) nanocomposites to construct a colorimetric immunoassay for CEA detection, which could catalyze sodium borohydride (NaBH4) to reduce 4-nitrophenol (4-NP) and make the yellow solution colorless. MoS2-AuNPs nanocomposites could e?ciently load antibodies (Ab1 and Ab2) because of their good biocompatibility and high adsorption ability, forming Ab1-MoS2-AuNPs nanoprobes for capturing CEA and Ab2-MoS2-AuNPs nanoprobes for catalytic reaction. It should be pointed out that Ab2-MoS2-AuNPs nanoprobes retained high catalytic activity because no blocking agent was used to block the catalytic sites. After the formation of the classical “sandwich” structure, parts of Ab2-MoS2-AuNPs nanoprobes remained in the supernatant after centrifugation, making the catalytic reaction occur and obtaining a colorless solution. As expected, a linear function between absorbance peak intensity and the logarithm of 5 pg/mL?10 ng/mL CEA was observed, and the detection limit was obtained as 0.5 pg/mL. This colorimetric immunosensor showed acceptable selectivity and repeatability for CEA detection, which could be successfully employed to detect CEA in serum.
关键词： nanoprobe,colorimetric,carcinoembryonic antigen,molybdenum disul?de,immunosensor
更新于2025-09-04 15:30:14