Journal
ACS NANO
Volume 6, Issue 10, Pages 9005-9012Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn303098n
Keywords
smart; fluorescence quenching; nanowire alignment; superhydrophobic; PDMS
Categories
Funding
- National Research Fund for Fundamental Key Projects [2009CB930404, 2010CB934700, 2011CB935700, 2012CB933200]
- National Natural Science Foundation [21201169, 20974113, 21071148, 20920102036, 21121001, 91127025, 51173099]
- Key Research Program of the Chinese Academy of Sciences [KJZD-EW-M01]
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The nanotechnology world Is being more and more attracted toward high aspect ratio one-dimensional nanostructures due to their potentials as building blocks for electronic/optical devices. Here, we propose a novel method to generate nanowire patterns with assistance of superhydrophobic flexible polydimethylsiloxane (PDMS) substrates. Micropillar gaps are tunable via a stretching process of the PDMS surface; thus, diverse nanowire patterns can be formed by stretching the same PDMS surface in various ways. Importantly, square nanowire loops with alternative compositions can be generated through a double-stretching process, showing an advanced methodology in controlling the alignment of nanowires. Since alternative fluorescent molecules will be quenched by diverse chemical substances, this alternative nanowire loop shows a selective detection for diverse target compounds, which greatly improves the application of this nanowire patterning approach. Furthermore, such alternative nanowire patterns can be transferred from pillar-structured surfaces to flat films, indicating further potentials in microcircuits, sensitive sensors, and other organic functional nanodevices.
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