Naslov
Direct-Write Deposition and Focused-Electron-Beam-Induced Purification of Gold Nanostructures

Autori
Belić, Domagoj ; Shawrav, Mostafa M. ; Gavagnin, Marco ; Stöger-Pollach, Michael ; Wanzenboeck, Heinz D. ; Bertagnolli, Emmerich

Izvornik
ACS Applied Materials & Interfaces (1944-8244) 7 (2015), 4; 2467-2479

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
FEBIC ; FEBID ; gold nanostructure ; nanopillar ; nanowire ; oxygen plasma cleaning ; purity

Sažetak
Three-dimensional gold (Au) nanostructures offer promise in nanoplasmonics, biomedical applications, electrochemical sensing and as contacts for carbon-based electronics. Direct-write techniques such as focused-electron-beam-induced deposition (FEBID) can provide such precisely patterned nanostructures. Unfortunately, FEBID Au traditionally suffers from a high nonmetallic content and cannot meet the purity requirements for these applications. Here we report exceptionally pure pristine FEBID Au nanostructures comprising submicrometer−large monocrystalline Au sections. On the basis of high-resolution transmission electron microscopy results and Monte Carlo simulations of electron trajectories in the deposited nanostructures, we propose a curing mechanism that elucidates the observed phenomena. The in situ focused-electron-beam-induced curing mechanism was supported by postdeposition ex situ curing and, in combination with oxygen plasma cleaning, is utilized as a straightforward purification method for planar FEBID structures. This work paves the way for the application of FEBID Au nanostructures in a new generation of biosensors and plasmonic nanodevices.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Interdisciplinarne prirodne znanosti

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