Scanning tunneling microscopy of hundred-nanometer thick Nafion polymer covered Pt and highly ordered pyrolytic graphite

Juanjuan Zhou, Xiangyang Zhou

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The atom-scale structure and properties of the interface between polymer electrolyte and electronic conductor are of great interest for novel electrochemical power sources including fuel cell, lithium batteries, and supercapacitors. Scanning tunneling microscopy, a well-known tool for imaging electronically conducting surface, is used to investigate Nafion polymer electrolyte coated Pt or highly ordered pyrolytic graphite. Periodic atom-scale patterns at the interface between Nafion and highly ordered pyrolytic graphite are obtained. In addition, in situ, real-time visualization of the atom-scale interface structure is realized upon changing the electrochemical potential of the substrates. The results suggest that a highly convergent resonant tunneling electron wave can penetrate a thick (200-1000 nm) recast Nafion (polymer electrolyte) coating and reach the substrates. A theory based on electron resonant tunneling is established to explain this phenomenon. It is expected that this method can be applied for real-time atom-scale visualization of other polymer/conductor interfaces.

Original languageEnglish
Article number234901
JournalJournal of Applied Physics
Volume113
Issue number23
DOIs
StatePublished - Jun 21 2013

Fingerprint

pyrolytic graphite
scanning tunneling microscopy
polymers
electrolytes
resonant tunneling
atoms
conductors
lithium batteries
electrochemical capacitors
fuel cells
electrons
coatings
conduction
electronics

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Scanning tunneling microscopy of hundred-nanometer thick Nafion polymer covered Pt and highly ordered pyrolytic graphite. / Zhou, Juanjuan; Zhou, Xiangyang.

In: Journal of Applied Physics, Vol. 113, No. 23, 234901, 21.06.2013.

Research output: Contribution to journalArticle

@article{1ef1f24027654fa49d0010e0e65451dd,
title = "Scanning tunneling microscopy of hundred-nanometer thick Nafion polymer covered Pt and highly ordered pyrolytic graphite",
abstract = "The atom-scale structure and properties of the interface between polymer electrolyte and electronic conductor are of great interest for novel electrochemical power sources including fuel cell, lithium batteries, and supercapacitors. Scanning tunneling microscopy, a well-known tool for imaging electronically conducting surface, is used to investigate Nafion polymer electrolyte coated Pt or highly ordered pyrolytic graphite. Periodic atom-scale patterns at the interface between Nafion and highly ordered pyrolytic graphite are obtained. In addition, in situ, real-time visualization of the atom-scale interface structure is realized upon changing the electrochemical potential of the substrates. The results suggest that a highly convergent resonant tunneling electron wave can penetrate a thick (200-1000 nm) recast Nafion (polymer electrolyte) coating and reach the substrates. A theory based on electron resonant tunneling is established to explain this phenomenon. It is expected that this method can be applied for real-time atom-scale visualization of other polymer/conductor interfaces.",
author = "Juanjuan Zhou and Xiangyang Zhou",
year = "2013",
month = "6",
day = "21",
doi = "10.1063/1.4811231",
language = "English",
volume = "113",
journal = "Journal of Applied Physics",
issn = "0021-8979",
publisher = "American Institute of Physics Publising LLC",
number = "23",

}

TY - JOUR

T1 - Scanning tunneling microscopy of hundred-nanometer thick Nafion polymer covered Pt and highly ordered pyrolytic graphite

AU - Zhou, Juanjuan

AU - Zhou, Xiangyang

PY - 2013/6/21

Y1 - 2013/6/21

N2 - The atom-scale structure and properties of the interface between polymer electrolyte and electronic conductor are of great interest for novel electrochemical power sources including fuel cell, lithium batteries, and supercapacitors. Scanning tunneling microscopy, a well-known tool for imaging electronically conducting surface, is used to investigate Nafion polymer electrolyte coated Pt or highly ordered pyrolytic graphite. Periodic atom-scale patterns at the interface between Nafion and highly ordered pyrolytic graphite are obtained. In addition, in situ, real-time visualization of the atom-scale interface structure is realized upon changing the electrochemical potential of the substrates. The results suggest that a highly convergent resonant tunneling electron wave can penetrate a thick (200-1000 nm) recast Nafion (polymer electrolyte) coating and reach the substrates. A theory based on electron resonant tunneling is established to explain this phenomenon. It is expected that this method can be applied for real-time atom-scale visualization of other polymer/conductor interfaces.

AB - The atom-scale structure and properties of the interface between polymer electrolyte and electronic conductor are of great interest for novel electrochemical power sources including fuel cell, lithium batteries, and supercapacitors. Scanning tunneling microscopy, a well-known tool for imaging electronically conducting surface, is used to investigate Nafion polymer electrolyte coated Pt or highly ordered pyrolytic graphite. Periodic atom-scale patterns at the interface between Nafion and highly ordered pyrolytic graphite are obtained. In addition, in situ, real-time visualization of the atom-scale interface structure is realized upon changing the electrochemical potential of the substrates. The results suggest that a highly convergent resonant tunneling electron wave can penetrate a thick (200-1000 nm) recast Nafion (polymer electrolyte) coating and reach the substrates. A theory based on electron resonant tunneling is established to explain this phenomenon. It is expected that this method can be applied for real-time atom-scale visualization of other polymer/conductor interfaces.

UR - http://www.scopus.com/inward/record.url?scp=84880818392&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84880818392&partnerID=8YFLogxK

U2 - 10.1063/1.4811231

DO - 10.1063/1.4811231

M3 - Article

AN - SCOPUS:84880818392

VL - 113

JO - Journal of Applied Physics

JF - Journal of Applied Physics

SN - 0021-8979

IS - 23

M1 - 234901

ER -