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Direct observation of quantum tunnelling charge transfers between molecules and semiconductors for SERS

Title
Direct observation of quantum tunnelling charge transfers between molecules and semiconductors for SERS
Authors
Kim N.-J.Kim J.Park J.-B.Kim H.Yi G.-C.Yoon S.
Ewha Authors
윤석현
SCOPUS Author ID
윤석현scopus
Issue Date
2019
Journal Title
Nanoscale
ISSN
2040-3364JCR Link
Citation
Nanoscale vol. 11, no. 1, pp. 45 - 49
Publisher
Royal Society of Chemistry
Indexed
SCI; SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
We used high-quality ZnO nanostructures/graphene substrates for understanding the mechanisms of charge transfer (CT) that take place under nonplasmonic conditions. As the optimal conditions for CT processes are found, we studied the range of CT normal to the ZnO surface that is coated with nanoscale HfO2 layers with different thicknesses. We could observe that CT decays over a few nanometers. In addition, we also observed a unique oscillation of the SERS intensity in the atomically thin oxide layers, which reflects the quantum tunneling effects of CT electrons across the oxide layers. To the best of our knowledge, this is the first direct observation of SERS-active charge transport and measurement of a CT span with atomic-scale accuracy. © The Royal Society of Chemistry.
DOI
10.1039/c8nr08389d
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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