2D GaN for Highly Reproducible Surface Enhanced Raman Scattering

Abstract

sitions between 2D semiconductors and probe molecules. Electron transition probability during the charge-transfer process can be expressed by Fermi's golden ruleThe ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/smll.202103442.

Crystalline phase induced Raman enhancement on molybdenum carbides

“…[11][12][13] In recent years, quasi-metals have gained intensive attention in the SERS area since their large density of states near the Fermi level can increase the probability of electron transition. 14,15 For example, ultrathin NbS 2 flakes, 14 WO 2 nanodendrites, 16 b-VO 2 nanosheets, 17 and MoO 2 nanospheres 18 have been developed as potential SERS substrates for enlarging the Raman signals of probe molecules via a charge transfer enhancement mechanism, presenting a new model of charge transfer from Fermi levels to molecular orbitals.…”

Semiconductor-based surface enhanced Raman scattering (SERS): from active materials to performance improvement

“…[72][73][74] Similar to noble metal nanostructures, the plasmon resonance of semiconductors can be manipulated by morphology design and optimization to enhance the SERS performance. 75 Benefiting from the abundant species and mature synthesis technology, various semiconductor nanostructures ranging from 0D (quantum dot, nanocrystalline), 68,76 1D (nanowire, nanorod, nanocone), 77,78 and 2D (nanoplate, nanodisk) 79,80 to 3D (nanocage, nanoflower, nanoarray) 81,82 have been developed. Fu et al synthesized α-Fe 3 O 4 nanocrystals with different morphologies and explored the influence of morphology on SERS performance.…”

Defect-Rich Monolayer MoS2 as a Universally Enhanced Substrate for Surface-Enhanced Raman Scattering

“…The CM is mainly a charge transfer (CT) generated by the interaction between the chemistry of the detection molecule and the substrate. The CM is considered the main enhancement mechanism for 2D materials, such as graphene [ 25 , 26 ] and TMDCs [ 27 , 28 ]. The Raman signal generated by the nonmetallic SERS substrate represented by MoS 2 is a combination of photoinduced charge transfer (PICT) between the dye molecule and the substrate as well as local dipoles resulting from changes in molecular symmetry [ 29 , 30 , 31 ].…”