Triboelectrically boosted SERS on sea-urchin-like gold clusters facilitated by a high dielectric substrate

Li, Haitao; Dai, Han; Zhang, Yihe; Lee, Yih Hong; Koh, Charlynn Sher Lin; Phan‐Quang, Gia Chuong; Tong, Wangshu; Gao, Hua; Ling, Xing Yi; An, Qi

doi:10.1016/j.nanoen.2019.103959

Cited by 28 publications

(23 citation statements)

References 40 publications

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“…where e, ε 0 and m e are electron charge, vacuum permittivity and effective mass of electrons, respectively. In our experiments, partial Ag NWs nearby the PVDF can discharge due to the transfer of an electron under the influence of positive potential by piezoelectric effect 31,34,35 . The decreased electrons in Ag NWs subsequently lead to the change of the ε(ω) owing to the alteration of ω p and Ω L , represented as www.nature.com/scientificreports www.nature.com/scientificreports/…”

Section: Methodsmentioning

confidence: 73%

Electric Field-Modulated Surface Enhanced Raman Spectroscopy by PVDF/Ag Hybrid

Song

Lei

et al. 2020

Sci Rep

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electrically modulated surface enhanced Raman scattering (e-SeRS) can be able to regulate the plasmon resonance peak of metal nanostructures, further improve the detection sensitivity of the SeRS substrate. However, the e-SeRS substrates require auxiliary equipment to provide the electrical potential, and most of them are non-flexible structure, which limits the application of E-SERS in the portable, in-situ and fast detection area. Here, we developed an electric field-modulated SERS substrate based on the piezoelectric effect by combining the PVDF (piezoelectric-modulated layer) and Ag nanowires (AgnWs) (SeRS active layer) and investigated the SeRS activity in experiment and theory. The enhanced electric field and the tunable plasmon resonance induced by the piezoelectric effect provide the additional enhancement for the SeRS signal. furthermore, we fabricated a SeRS active ring with a piezoelectric field-modulated substrate and achieved the in-situ detection of glucose with a non-invasive method. this work provided innovation for the e-SeRS and could greatly promote the development of the in-situ, wearable and intelligent sensors.

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Section: Methodsmentioning

confidence: 73%

Electric Field-Modulated Surface Enhanced Raman Spectroscopy by PVDF/Ag Hybrid

Song

Lei

et al. 2020

Sci Rep

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“…The distribution of electron density in frontier orbits is of great significance for the study of electron transfer between molecules. 41,42 We optimize the structures of BPA, rGO–PEI, Ag clusters and Ag cluster@rGO to obtain the distribution of the HOMO and LUMO orbitals as shown in Fig. 6e.…”

Section: Resultsmentioning

confidence: 99%

Flexible nano-cloth-like Ag cluster@rGO with ultrahigh SERS sensitivity for capture-optimization-detection due to effective molecule–substrate interactions

Cui

et al. 2022

Nanoscale

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“…When light matches the collective oscillation frequency of free electrons, the incident light interacts with nanomaterials and enhances the local EM field . As an electric field (EF) can effectively adjust the electron density on noble metals, the application of an EF is an effective method to enhance the EM field at the “hotspot.” In general, an ideal substrate for electrically modulated SERS (E-SERS) is not only electrically conductive but also connected with an electrochemical system for applying a bias. , Therefore, the construction of a self-powered, low-cost, and sensitive E-SERS substrate is an alternative way to achieve real applications and point-of-care testing (POCT).…”

Section: Introductionmentioning

confidence: 99%

Wireless Battery-Free Generation of Electric Fields on One-Dimensional Asymmetric Au/ZnO Nanorods for Enhanced Raman Sensing

Jian

et al. 2021

Anal. Chem.

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Wearable electronics have great potential in enhancing health monitoring, disease diagnosis, and environmental pollution tracking. Development of wearable surface-enhanced Raman spectroscopy (SERS) substrates with target sampling and sensitive sensing functions is a promising way to obtain physical and chemical information. This study describes a facile and effective approach for constructing an electrically modulated SERS (E-SERS) substrate as a wearable and wireless battery-free substrate with improved sensitivity. By integrating zinc oxide nanorods (ZnO NRs) with asymmetric gold decoration, controllable enhanced piezoelectric potentials were achieved using magnets to supply the adjustable pressure force. Owing to spatially oriented electron–hole pair separation on the asymmetric NRs, the local hotspot intensity at the Au tips is significantly improved, increasing the SERS signal by 6.7 times. This mechanism was quantitatively analyzed using Raman spectra by in situ formation of Prussian blue (PB). As a proof-of-concept, the E-SERS substrate was further used as a wearable flexible device to directly collect the sweat on a runner’s skin and then monitor the lactate status of the runner. This study offers new insight into the development of E-SERS substrates and provides new design options for the construction of wearable sampling and sensing devices for the noninvasive monitoring of metabolites in healthcare and biomedical fields.

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Triboelectrically boosted SERS on sea-urchin-like gold clusters facilitated by a high dielectric substrate

Cited by 28 publications

References 40 publications

Electric Field-Modulated Surface Enhanced Raman Spectroscopy by PVDF/Ag Hybrid

Electric Field-Modulated Surface Enhanced Raman Spectroscopy by PVDF/Ag Hybrid

Flexible nano-cloth-like Ag cluster@rGO with ultrahigh SERS sensitivity for capture-optimization-detection due to effective molecule–substrate interactions

Wireless Battery-Free Generation of Electric Fields on One-Dimensional Asymmetric Au/ZnO Nanorods for Enhanced Raman Sensing

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