Investigation of redox potential and negative differential resistance behavior of heteropolyacids by scanning tunneling microscopy Conference Paper

abstract

• Nanoscale images and tunneling spectra of cation-exchanged or polyatom-substituted heteropolyacids (HPAs) were probed by scanning tunneling microscopy (STM) at room temperature. All the HPAs formed two-dimensional ordered arrays on graphite surfaces, and their molecular dimensions were in good agreement with values determined by X-ray crystallography. It was observed that the negative differential resistance (NDR) peak voltage measured by STM was closely related to the reduction potential of the corresponding bulk HPA. The higher the reduction potential of the HPA, the lower the applied voltage at which NDR was observed. 1998 Elsevier Science B.V. All rights reserved.

authors

• Barteau, Mark

published proceedings

• CATALYSIS TODAY

author list (cited authors)

• Song, I. K., Kaba, M. S., Barteau, M. A., & Lee, W. Y.

citation count

• 22

complete list of authors

• Song, IK||Kaba, MS||Barteau, MA||Lee, WY

publication date

• September 1998

publisher

• Elsevier  Publisher

published in

• Catalysis Today  Journal

keywords

• Heteropolyacid
• Ndr
• Redox Potential
• Stm

Digital Object Identifier (DOI)

• 10.1016/S0920-5861(98)00201-6

start page

• 285

end page

• 291

volume

• 44

issue

• 1-4

URL

• http://dx.doi.org/10.1016/s0920-5861(98)00201-6