Kelvin Probe Force Microscopy in Nonpolar Liquids
- Publication type:
- Journal article
- Metadata:
-
- Autoren
- Anna L Domanski
- Esha Sengupta
- Karina Bley
- Maria B Untch
- Stefan AL Weber
- Katharina Landfester
- Clemens K Weiss
- Hans-Juergen Butt
- Ruediger Berger
- Autoren-URL
- https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=fis-test-1&SrcAuth=WosAPI&KeyUT=WOS:000309431100017&DestLinkType=FullRecord&DestApp=WOS_CPL
- DOI
- 10.1021/la302451h
- Externe Identifier
- Clarivate Analytics Document Solution ID: 015FF
- PubMed Identifier: 22946889
- ISSN
- 0743-7463
- Ausgabe der Veröffentlichung
- 39
- Zeitschrift
- LANGMUIR
- Paginierung
- 13892 - 13899
- Datum der Veröffentlichung
- 2012
- Status
- Published
- Titel
- Kelvin Probe Force Microscopy in Nonpolar Liquids
- Sub types
- Article
- Ausgabe der Zeitschrift
- 28
Data source: Web of Science (Lite)
- Other metadata sources:
-
- Autoren
- Anna L Domanski
- Esha Sengupta
- Karina Bley
- Maria B Untch
- Stefan AL Weber
- Katharina Landfester
- Clemens K Weiss
- Hans-Jürgen Butt
- Rüdiger Berger
- DOI
- 10.1021/la302451h
- eISSN
- 1520-5827
- ISSN
- 0743-7463
- Ausgabe der Veröffentlichung
- 39
- Zeitschrift
- Langmuir
- Sprache
- en
- Online publication date
- 2012
- Paginierung
- 13892 - 13899
- Datum der Veröffentlichung
- 2012
- Status
- Published
- Herausgeber
- American Chemical Society (ACS)
- Herausgeber URL
- http://dx.doi.org/10.1021/la302451h
- Datum der Datenerfassung
- 2023
- Titel
- Kelvin Probe Force Microscopy in Nonpolar Liquids
- Ausgabe der Zeitschrift
- 28
Data source: Crossref
- Abstract
- Work function changes of Au were measured by Kelvin probe force microscopy (KPFM) in the nonpolar liquid decane. As a proof of principle for the measurement in liquids, we investigated the work function change of an Au substrate upon hexadecanethiol chemisorption. To relate the measured contact potential difference (CPD) during the chemisorption of alkanethiols to a change of the work function, the influence of physisorbed decane must be taken into account. It is crucial that either the work function of the scanning probe microscope (SPM) tip or the sample surface remains constant throughout the reaction, since both contribute to the CPD. We describe two routes for determining the work function shift of Au coated with a monolayer of alkanethiols: In the first route, the SPM tips were taken as reference surfaces (constant tip work function). For this approach, we used Au(111) surfaces and kept the SPM tip ex situ during the adsorption process. In the second route, structured surfaces with reactive and inert parts were studied by KPFM (constant reference work function). For this route, we prepared nanometer sized Au structures by nanosphere lithography on SiO(x) substrates. Now, the SiO(x) served as the inert reference surface. The shifts in the work function after exposure to the hexadecanethiol (HDT) solution were determined to be ΔΦ(Au+HDT,decane-Au,air) = -1.33 eV ± 0.07 eV (route I) and ΔΦ(Au+HDT,decane-Au,air) = -1.46 eV ± 0.04 eV (route II). Both values are in excellent agreement with the work function shifts determined by ultraviolet photoemission spectroscopy (UPS) reported in literature. The presented procedures of measuring work function changes in decane open new ways to study local reactions at solid-liquid interfaces.
- Addresses
- Max Planck Institute for Polymer Research, Mainz, Germany.
- Autoren
- Anna L Domanski
- Esha Sengupta
- Karina Bley
- Maria B Untch
- Stefan AL Weber
- Katharina Landfester
- Clemens K Weiss
- Hans-Jürgen Butt
- Rüdiger Berger
- DOI
- 10.1021/la302451h
- eISSN
- 1520-5827
- Externe Identifier
- PubMed Identifier: 22946889
- Open access
- false
- ISSN
- 0743-7463
- Ausgabe der Veröffentlichung
- 39
- Zeitschrift
- Langmuir : the ACS journal of surfaces and colloids
- Sprache
- eng
- Medium
- Print-Electronic
- Online publication date
- 2012
- Paginierung
- 13892 - 13899
- Datum der Veröffentlichung
- 2012
- Status
- Published
- Datum der Datenerfassung
- 2012
- Titel
- Kelvin probe force microscopy in nonpolar liquids.
- Sub types
- Journal Article
- Ausgabe der Zeitschrift
- 28
Data source: Europe PubMed Central
- Abstract
- Work function changes of Au were measured by Kelvin probe force microscopy (KPFM) in the nonpolar liquid decane. As a proof of principle for the measurement in liquids, we investigated the work function change of an Au substrate upon hexadecanethiol chemisorption. To relate the measured contact potential difference (CPD) during the chemisorption of alkanethiols to a change of the work function, the influence of physisorbed decane must be taken into account. It is crucial that either the work function of the scanning probe microscope (SPM) tip or the sample surface remains constant throughout the reaction, since both contribute to the CPD. We describe two routes for determining the work function shift of Au coated with a monolayer of alkanethiols: In the first route, the SPM tips were taken as reference surfaces (constant tip work function). For this approach, we used Au(111) surfaces and kept the SPM tip ex situ during the adsorption process. In the second route, structured surfaces with reactive and inert parts were studied by KPFM (constant reference work function). For this route, we prepared nanometer sized Au structures by nanosphere lithography on SiO(x) substrates. Now, the SiO(x) served as the inert reference surface. The shifts in the work function after exposure to the hexadecanethiol (HDT) solution were determined to be ΔΦ(Au+HDT,decane-Au,air) = -1.33 eV ± 0.07 eV (route I) and ΔΦ(Au+HDT,decane-Au,air) = -1.46 eV ± 0.04 eV (route II). Both values are in excellent agreement with the work function shifts determined by ultraviolet photoemission spectroscopy (UPS) reported in literature. The presented procedures of measuring work function changes in decane open new ways to study local reactions at solid-liquid interfaces.
- Autoren
- Anna L Domanski
- Esha Sengupta
- Karina Bley
- Maria B Untch
- Stefan AL Weber
- Katharina Landfester
- Clemens K Weiss
- Hans-Jürgen Butt
- Rüdiger Berger
- Autoren-URL
- https://www.ncbi.nlm.nih.gov/pubmed/22946889
- DOI
- 10.1021/la302451h
- eISSN
- 1520-5827
- Ausgabe der Veröffentlichung
- 39
- Zeitschrift
- Langmuir
- Sprache
- eng
- Country
- United States
- Paginierung
- 13892 - 13899
- Datum der Veröffentlichung
- 2012
- Status
- Published
- Datum, an dem der Datensatz öffentlich gemacht wurde
- 2013
- Titel
- Kelvin probe force microscopy in nonpolar liquids.
- Sub types
- Journal Article
- Ausgabe der Zeitschrift
- 28
Data source: PubMed
- Beziehungen:
-