Ambient Tip-Enhanced Photoluminescence with 5 nm Spatial Resolution

Wang, Chih-Feng; Zamkov, Mikhail; El-Khoury, Patrick Z.

doi:10.1021/acs.jpcc.1c04012

Ambient Tip-Enhanced Photoluminescence with 5 nm Spatial Resolution

Journal Article · Wed May 26 00:00:00 EDT 2021 · Journal of Physical Chemistry. C

DOI:https://doi.org/10.1021/acs.jpcc.1c04012· OSTI ID:1831436

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Pacific Northwest National Lab. (PNNL), Richland, WA (United States); BGSU
Bowling Green State Univ., OH (United States)
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

We achieve record spatial resolution in ambient tip-enhanced photoluminescence (TEPL) from CdSe/ZnS semiconductor quantum dots (QDs). Our approach only takes advantage of surface roughness at the apex of a sputtered plasmonic gold probe. When irradiated with visible light (633 and 532 nm lasers), nanocorrugated regions of the apex of an Au tip support 5 nm spatial resolution in TEPL imaging of QD aggregates on silicon. The reproducibility of our observations is illustrated using different plasmonic probes and samples. The origin of the observed near-field contrast, underlying the demonstrated high spatial resolution in TEPL, is discussed in the context of field enhancement at the metal tip-fluorophore interface.

View Accepted Manuscript (DOE)

Research Organization:: Bowling Green State University, OH (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0016872

OSTI ID:: 1831436

Alternate ID(s):: OSTI ID: 1804293

Journal Information:: Journal of Physical Chemistry. C, Journal Name: Journal of Physical Chemistry. C Journal Issue: 22 Vol. 125; ISSN 1932-7447

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
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