Inelastic electron-tunneling spectroscopy of nanoporous gold films

Abstract

We investigated the localized electronic properties of nanoporous gold films by using an ultrahigh vacuum scanning tunneling microscope at low temperature (4.2 K). Second derivative scanning tunneling spectroscopy shows the plasmon peaks of the nanoporous gold films, which are excited by inelastic tunneling electrons. We propose that the nanorod model is appropriate for nanoporous gold studies at the nanometer-scale. These results are supported by a 3D electron tomography analysis and theoretical calculations of nanoporous gold with ellipsoid shape.

TEM Tomography of Pores with Application to Computational Nanoscale Flows in Nanoporous Silicon Nitride (NPN)

“…Most frequently paired with TEM, ET has been used to determine the structure of nanoparticles [ 12 ], gel-embedded objects [ 13 ], and biological structures [ 14 ]. As the structure of nanofeatures often governs their function, researchers have studied nanopores using electron tomography in a variety of membranes and nanomaterials as diverse as GaSb [ 15 ], α-Fe 2 O 3 [ 16 ], nanoporous gold [ 17 ], or FIB-sculpted silicon nitride [ 18 ]. The method of manufacture will create silicon nanomembranes with different nanopore features, especially when comparing self-assembly processes [ 1 , 2 , 19 ] to direct patterning techniques [ 18 , 20 ].…”

Controllable fabrication and temperature-resistance characteristics of ordered nanoporous Au and Pt films

“…Nowadays, researchers focus mainly on understanding the catalytic properties of the nanoporous novel metal films [11][12][13]. To the best of our knowledge, however, there are only a few reported examples of such nanostructured films for electronic properties [14,15]. For the nanoporous novel metal film, the electronic transport processes may be very much distinct from those of the widely studied micrometerperiod structures.…”