Abstract
A very simple polydimethylsiloxane (PDMS) pattern-transfer method is devised, called buffered-oxide etchant (BOE) printing. The mechanism of pattern transfer is investigated, by considering the strong adhesion between the BOE-treated PDMS and the SiO2 substrate. PDMS patterns from a few micrometers to sub-micrometer size are transferred to the SiO2 substrate by just pressing a stamp that has been immersed in BOE solution for a few minutes. The patterned PDMS layers work as perfect physical and chemical passivation layers in the fabrication of metal electrodes and V 2O5 nanowire channels, respectively. Interestingly, a second stamping of the BOE-treated PDMS on the SiO2 substrate pre-patterned with metal as well as PDMS results in a selective transfer of the PDMS patterns only to the bare SiO2. In this way, the fabrication of a device structure consisting of two Au electrodes and V2O 5 nanowire network channels is possible; non-ohmic semiconducting I-V characteristics, which can be modeled by serially connected percolation, are observed.
Original language | English |
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Pages (from-to) | 2125-2132 |
Number of pages | 8 |
Journal | Advanced Functional Materials |
Volume | 17 |
Issue number | 13 |
DOIs | |
Publication status | Published - 2007 Sept 3 |
ASJC Scopus subject areas
- General Chemistry
- General Materials Science
- Condensed Matter Physics