Controlling nanowire growth by light
American Chemical Society
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di, M. G., Michaelis, F., Salmon, A., Hofmann, S., & Baumberg, J. (2015). Controlling nanowire growth by light. Nano Letters, 15 7452-7457. https://doi.org/10.1021/acs.nanolett.5b02953
Individual Au catalyst nanoparticles are used for selective laser-induced chemical vapor deposition of single germanium nanowires. Dark-field scattering reveals in real time the optical signatures of all key constituent growth processes. Growth is initially triggered by plasmonic absorption in the Au catalyst, while once nucleated the growing Ge nanowire supports magnetic and electric resonances that then dominate the laser interactions. This spectroscopic understanding allows real-time laser feedback that is crucial toward realizing the full potential of controlling nanomaterial growth by light.
Catalysis, laser-induced chemical vapor deposition, germanium nanowires, plasmonics, dark field spectroscopy, magnetic resonances
We acknowledge financial support from EPSRC Grant EP/G060649/1, EP/L027151/1, EP/G037221/1, EPSRC NanoDTC, and ERC Grant LINASS 320503. S.H. acknowledges funding from ERC Grant InsituNANO 279342.
European Research Council (320503)
European Research Council (279342)
External DOI: https://doi.org/10.1021/acs.nanolett.5b02953
This record's URL: https://www.repository.cam.ac.uk/handle/1810/252462