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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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Inorganic Chemistry Frontiers · 2023 ·Vol. 10 ·期 12 ·3648-3655 · IF 7

Significant surface-enhanced Raman scattering effect of Ag-loaded iron hydroxide enabled by coordination effect between Ag and hydroxyl group

Xiangyu Meng,Jian Yu,Jingjing Wu,Yuening Wang,Xiaoyu Song,Ziyan Xu,Anran Li,Lin Qiu,Jie Lin,Xiaotian Wang

The effective monitoring of trace carcinogens in the environment and daily necessities is very important for humans. Here, Ag-loaded iron hydroxide (Ag/Fe(OH)3) was designed as an excellent surface-enhanced Raman scattering (SERS) substrate and used for the trace detection of carcinogenic aromatic amine p-aminoazobenzene (PAAB). Due to the weak binding ability of Fe3+ with OH−, Fe(OH)3 presents a strong coordination ability with Ag than Co(OH)2 and Ni(OH)2, resulting in the prominent adjustability of Ag/Fe(OH)3, including the localized surface plasmon resonance (LSPR) property and energy band structure. On the one hand, the dielectric environment of Ag nanoparticles is changed due to the coordination effect of Ag and OH−, among which the LSPR of Ag/Fe(OH)3 in the visible region is significantly enhanced. On the other hand, the energy band gap of Ag/Fe(OH)3 is reduced by increasing the content of Ag, achieving effective photo-induced charge transfer (PICT) under excitation at 633 nm. Comprehensively, an enhancement factor (EF) of 1.23 × 106 was achieved for 4-ATP molecules through the synergistic interaction of LSPR and PICT. Importantly, Ag/Fe(OH)3 presents an ultra-low detection limit for PAAB (10−9 M), which is of great significance for the trace detection of carcinogenic aromatic amines.

CAS / MDL: 7782-61-8 13478-00-7 7761-88-8

研究领域: 分析化学 · 环境科学 · 材料科学

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

Significant surface-enhanced Raman scattering effect of Ag-loaded iron hydroxide enabled by coordination effect between Ag and hydroxyl group