Dual-pulse photoactivated atomic force microscopy

Abstract Photoactivated atomic force microscopy (pAFM), which integrates light excitation and mechanical detection of the deflections of a cantilever tip, has become a widely used tool for probing nanoscale structures. Raising the illuminating laser power is an obvious way to boost the signal-to-noi...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Byullee Park, Seunghyun Lee, Jimin Kwon, Woojo Kim, Sungjune Jung, Chulhong Kim
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/dcca980e396c4c588c2db0a806031436
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:dcca980e396c4c588c2db0a806031436
record_format	dspace
spelling	oai:doaj.org-article:dcca980e396c4c588c2db0a8060314362021-12-02T15:09:23ZDual-pulse photoactivated atomic force microscopy10.1038/s41598-021-96646-42045-2322https://doaj.org/article/dcca980e396c4c588c2db0a8060314362021-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-96646-4https://doaj.org/toc/2045-2322Abstract Photoactivated atomic force microscopy (pAFM), which integrates light excitation and mechanical detection of the deflections of a cantilever tip, has become a widely used tool for probing nanoscale structures. Raising the illuminating laser power is an obvious way to boost the signal-to-noise ratio of pAFM, but strong laser power can damage both the sample and cantilever tip. Here, we demonstrate a dual-pulse pAFM (DP-pAFM) that avoids this problem by using two laser pulses with a time delay. The first laser heats the light absorber and alters the local Grüneisen parameter value, and the second laser boosts the mechanical vibration within the thermal relaxation time. Using this technique, we successfully mapped the optical structures of small-molecule semiconductor films. Of particular interest, DP-pAFM clearly visualized nanoscale cracks in organic semiconductor films, which create crucial problems for small-molecule semiconductors. DP-pAFM opens a promising new optical avenue for studying complex nanoscale phenomena in various research fields.Byullee ParkSeunghyun LeeJimin KwonWoojo KimSungjune JungChulhong KimNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Byullee Park Seunghyun Lee Jimin Kwon Woojo Kim Sungjune Jung Chulhong Kim Dual-pulse photoactivated atomic force microscopy
description	Abstract Photoactivated atomic force microscopy (pAFM), which integrates light excitation and mechanical detection of the deflections of a cantilever tip, has become a widely used tool for probing nanoscale structures. Raising the illuminating laser power is an obvious way to boost the signal-to-noise ratio of pAFM, but strong laser power can damage both the sample and cantilever tip. Here, we demonstrate a dual-pulse pAFM (DP-pAFM) that avoids this problem by using two laser pulses with a time delay. The first laser heats the light absorber and alters the local Grüneisen parameter value, and the second laser boosts the mechanical vibration within the thermal relaxation time. Using this technique, we successfully mapped the optical structures of small-molecule semiconductor films. Of particular interest, DP-pAFM clearly visualized nanoscale cracks in organic semiconductor films, which create crucial problems for small-molecule semiconductors. DP-pAFM opens a promising new optical avenue for studying complex nanoscale phenomena in various research fields.
format	article
author	Byullee Park Seunghyun Lee Jimin Kwon Woojo Kim Sungjune Jung Chulhong Kim
author_facet	Byullee Park Seunghyun Lee Jimin Kwon Woojo Kim Sungjune Jung Chulhong Kim
author_sort	Byullee Park
title	Dual-pulse photoactivated atomic force microscopy
title_short	Dual-pulse photoactivated atomic force microscopy
title_full	Dual-pulse photoactivated atomic force microscopy
title_fullStr	Dual-pulse photoactivated atomic force microscopy
title_full_unstemmed	Dual-pulse photoactivated atomic force microscopy
title_sort	dual-pulse photoactivated atomic force microscopy
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/dcca980e396c4c588c2db0a806031436
work_keys_str_mv	AT byulleepark dualpulsephotoactivatedatomicforcemicroscopy AT seunghyunlee dualpulsephotoactivatedatomicforcemicroscopy AT jiminkwon dualpulsephotoactivatedatomicforcemicroscopy AT woojokim dualpulsephotoactivatedatomicforcemicroscopy AT sungjunejung dualpulsephotoactivatedatomicforcemicroscopy AT chulhongkim dualpulsephotoactivatedatomicforcemicroscopy
_version_	1718387844953669632

Dual-pulse photoactivated atomic force microscopy

Ejemplares similares