Author(s): Hu, YC (Hu, Yuecong); Chen, SC (Chen, Shaochuang); Cong, X (Cong, Xin); Sun, SD (Sun, Sida); Wu, JB (Wu, Jiang-bin); Zhang, DQ (Zhang, Daqi); Yang, F (Yang, Feng); Yang, J (Yang, Juan); Tan, PH (Tan, Ping-Heng); Li, Y (Li, Yan)

Source: JOURNAL OF PHYSICAL CHEMISTRY LETTERS Volume: 11 Issue: 24 Pages: 10497-10503 DOI: 10.1021/acs.jpclett.0c03320 Published: DEC 17 2020

Abstract: The electronic Raman scattering (ERS) features of single-walled carbon nanotubes (SWNTs) can reveal a wealth of information about their electronic structures. Previously, the ERS processes have been exclusively reported in metallic SWNTs (M-SWNTs) and attributed to the inelastic scattering of photoexcited excitons by a continuum of low-energy electron-hole pairs near the Fermi level. Therefore, the ERS features have been thought to appear exclusively in M-SWNTs but not in semiconducting SWNTs (S-SWNTs), which are more desired in many application fields such as nanoelectronics and bioimaging. In this work, the experimental observation of the ERS features in suspended S-SWNTs is reported, the processes of which are accomplished via the available high-energy electron-hole pairs. The excitonic transition energies with an uncertainty in the order of +/- 1 meV can be directly obtained via the ERS spectra, compared to a typical uncertainty of +/- 10 meV in conventional electronic spectroscopies. The ERS features can facilitate further systematic studies on the properties of SWNT, both metallic and semiconducting, with defined chirality.

Accession Number: WOS:000609003900032

PubMed ID: 33284619

Author Identifiers:

Author        Web of Science ResearcherID        ORCID Number

Cong, Xin         ABI-4705-2020

Li, Yan         D-5497-2009

Yang, Feng         O-4424-2019

Yang, Feng         K-4358-2014         0000-0002-3637-814X

TAN, Ping-Heng         D-1137-2009         0000-0001-6575-1516

ISSN: 1948-7185

Full Text: https://pubs.acs.org/doi/10.1021/acs.jpclett.0c03320