In this review,we present a brief overview on the recent advances in Angstr6m-resolved tip-enhanced Raman spectromicroscopy.We first introduce the theoretical understanding of the confinement of light at the atomistic...In this review,we present a brief overview on the recent advances in Angstr6m-resolved tip-enhanced Raman spectromicroscopy.We first introduce the theoretical understanding of the confinement of light at the atomistic scale,and explain how the Raman scattering from a single molecule happens under the“illumination”of such an atomically confined light.Then we describe the latest developments on Angstr6m-resolved tipenhanced Raman spectromicroscopy,particularly on a new methodology called“scanning Raman picoscopy”for visually cons true ting the chemical st ruc ture of a single molecule in real space.Finally,we give a perspective of this technique in various applications where iden ti fying the chemical st ruc tu res of mat erials at the chemical bond level is required.展开更多
In this study,we investigate the intensity and spectral fluctuations in surface-enhanced Raman scattering(SERS)signals from individual plasmonic nanocavities.Extremely long-duration blinking components lasting up to m...In this study,we investigate the intensity and spectral fluctuations in surface-enhanced Raman scattering(SERS)signals from individual plasmonic nanocavities.Extremely long-duration blinking components lasting up to minutes are observed in the SERS intensity fluctuation at room temperature,which can be characterized by successive and random appearance and eventual disappearance of multiple vibrational modes at different frequencies.Theoretical simulations show that multiple hotspots acting on different molecular sites are required to explain these multipeak features,suggesting that the source of long-duration blinking events is multiple atomic-scale protrusions interacting simultaneously with different sites of individual molecules or each with a different molecule.展开更多
基金This work was supported by the National Key R&D Program of China(No.2016YFA0200600)the National Natural Science Foundation of China,the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDB36000000)the Anhui Initiative in Quantum Information Technologies.
文摘In this review,we present a brief overview on the recent advances in Angstr6m-resolved tip-enhanced Raman spectromicroscopy.We first introduce the theoretical understanding of the confinement of light at the atomistic scale,and explain how the Raman scattering from a single molecule happens under the“illumination”of such an atomically confined light.Then we describe the latest developments on Angstr6m-resolved tipenhanced Raman spectromicroscopy,particularly on a new methodology called“scanning Raman picoscopy”for visually cons true ting the chemical st ruc ture of a single molecule in real space.Finally,we give a perspective of this technique in various applications where iden ti fying the chemical st ruc tu res of mat erials at the chemical bond level is required.
基金supported by the National Key Research and Development Program of China(No.2022YFA1404201)the National Natural Science Foundation of China(Nos.62127817,62075122,62075120,62222509,U22A2091,62222509,and 62105193)+3 种基金the Program for Changjiang Scholars and Innovative Research Team in University(No.IRT_17R70)the 1331 Project,Higher Education Discipline Innovation Project(No.D18001)the Department of Science and Technology of Shanxi Province(No.202104041101021)the Shanxi Province Science and Technology Innovation Talent Team(No.202204051001014).
文摘In this study,we investigate the intensity and spectral fluctuations in surface-enhanced Raman scattering(SERS)signals from individual plasmonic nanocavities.Extremely long-duration blinking components lasting up to minutes are observed in the SERS intensity fluctuation at room temperature,which can be characterized by successive and random appearance and eventual disappearance of multiple vibrational modes at different frequencies.Theoretical simulations show that multiple hotspots acting on different molecular sites are required to explain these multipeak features,suggesting that the source of long-duration blinking events is multiple atomic-scale protrusions interacting simultaneously with different sites of individual molecules or each with a different molecule.
