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Nano-Micro Letters · 2021 ·Vol. 13 ·期 1 ·1-17 · IF 16.419

Charge-Transfer Resonance and Electromagnetic Enhancement Synergistically Enabling MXenes with Excellent SERS Sensitivity for SARS-CoV-2 S Protein Detection

Peng Yusi,Lin Chenglong,Long Li,Masaki Tanemura,Tang Mao,Yang Lili,Liu Jianjun,Huang Zhengren,Li Zhiyuan,Luo Xiaoying,Lombardi John R.,Yang Yong

Nb 2 C and Ta 2 C MXenes exhibit remarkable SERS performance with the enhancement factors of 3.0 × 10 6 and 1.4 × 10 6 , which is synergistically enabled by the PICT resonance enhancement and electromagnetic enhancement. The excellent SERS sensitivity endows Ta 2 C MXene with the capability to sensitively detect and accurately identify the SARS-CoV-2 spike protein, which is beneficial to achieve real-time monitoring and early warning of novel coronavirus.

CAS / MDL: 7664-39-3

研究领域: 材料科学 · 纳米技术 · 分析化学 · 病毒学

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Optical Materials Express · 2021 ·Vol. 11 ·期 5 ·1504-1514 · IF 3.442

Large-area uniform Ag nanostructure films prepared by a heat reduction method for SERS application

Qingqing Zhang,Qingqing Zhang,Xueqin Wang,Xueqin Wang,Jinguo Jiang,Hen Yao,Qian Nie,Zhongchen Bai,Zhongchen Bai

We prepared an active large-area uniform Ag nanostructure film by using the thermally reducing polyvinyl alcohol (PVA)/silver nitrate (AgNO3) composite film for surface-enhanced Raman scattering (SERS) application. The PVA/AgNO3 composite films were spin-coated on the surface of indium tin oxide (ITO) glass, and then were heated to about 500 °C for 10 minutes, forming Ag nanostructure films with a thickness of 100 nm and a large area of 3.24 cm2. The results showed that single layer Ag nano-film had a network structure with a skeleton distribution. Moreover, the large ratio of Ag nanostructure to film area was about 63%. Using melamine molecules as a probe, the maximum enhancement factor of the SERS signal could reach 1149, and the SERS sensitivity and the minimum detection limit were respectively up to 76.91 and 3.85 ng/ml. This method of preparing SERS film can provide a new pathway for the application of low-cost and large-area SERS substrates.

CAS / MDL: 9002-89-5

研究领域: 材料科学 · 纳米技术 · 分析化学 · 表面科学

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Charge-Transfer Resonance and Electromagnetic Enhancement Synergistically Enabling MXenes with Excellent SERS Sensitivity for SARS-CoV-2 S Protein Detection

Large-area uniform Ag nanostructure films prepared by a heat reduction method for SERS application