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Plasmonic response of Ag- and Au-infiltrated cross-linked lysozyme crystals

Plasmonic response of Ag- and Au-infiltrated cross-linked lysozyme crystals
Plasmonic response of Ag- and Au-infiltrated cross-linked lysozyme crystals
Metal-infiltrated protein crystals form a novel class of bio-nanomaterials of great interest for applications in biomedicine, chemistry, and optoelectronics. As yet, very little is known about the internal structure of these materials and the interconnectivity of the metallic network. Here, the optical response of individual Au- and Ag-infiltrated cross-linked lysozyme crystals is investigated using angle- and polarization-dependent spectroscopy. The measurements unequivocally show that metallic inclusions formed inside the nanoporous solvent channels do not connect into continuous nanowires, but rather consist of ensembles of isolated spheroidal nanoclusters with aspect ratios as high as a value of four, and which exhibit a pronounced plasmonic response that is isotropic on a macroscopic length scale. Fluorescence measurement in the visible range show a strong contribution from the protein host, which is quenched by the Au inclusions, and a weaker contribution attributed to the molecule-like emission from small Au-clusters
1616-301X
281-290
Muskens, Otto L.
2284101a-f9ef-4d79-8951-a6cda5bfc7f9
England, Matt W.
69338980-c09b-4dc4-8f7d-3e606c589a8a
Danos, Lefteris
c831e137-37b9-42cc-ab8c-49de31038922
Li, Mei
482f90e4-e07a-45e9-ab99-3044993ed645
Mann, Stephen
1cbb2d4f-aee2-403c-9950-18bd388f02c0
Muskens, Otto L.
2284101a-f9ef-4d79-8951-a6cda5bfc7f9
England, Matt W.
69338980-c09b-4dc4-8f7d-3e606c589a8a
Danos, Lefteris
c831e137-37b9-42cc-ab8c-49de31038922
Li, Mei
482f90e4-e07a-45e9-ab99-3044993ed645
Mann, Stephen
1cbb2d4f-aee2-403c-9950-18bd388f02c0

Muskens, Otto L., England, Matt W., Danos, Lefteris, Li, Mei and Mann, Stephen (2013) Plasmonic response of Ag- and Au-infiltrated cross-linked lysozyme crystals. Advanced Functional Materials, 23 (3), 281-290. (doi:10.1002/adfm.201201718).

Record type: Article

Abstract

Metal-infiltrated protein crystals form a novel class of bio-nanomaterials of great interest for applications in biomedicine, chemistry, and optoelectronics. As yet, very little is known about the internal structure of these materials and the interconnectivity of the metallic network. Here, the optical response of individual Au- and Ag-infiltrated cross-linked lysozyme crystals is investigated using angle- and polarization-dependent spectroscopy. The measurements unequivocally show that metallic inclusions formed inside the nanoporous solvent channels do not connect into continuous nanowires, but rather consist of ensembles of isolated spheroidal nanoclusters with aspect ratios as high as a value of four, and which exhibit a pronounced plasmonic response that is isotropic on a macroscopic length scale. Fluorescence measurement in the visible range show a strong contribution from the protein host, which is quenched by the Au inclusions, and a weaker contribution attributed to the molecule-like emission from small Au-clusters

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Published date: 1 January 2013
Organisations: Engineering Science Unit, Quantum, Light & Matter Group

Identifiers

Local EPrints ID: 346559
URI: http://eprints.soton.ac.uk/id/eprint/346559
ISSN: 1616-301X
PURE UUID: a1b8fe72-5f5a-4a0f-9b74-f6e95ce98652
ORCID for Otto L. Muskens: ORCID iD orcid.org/0000-0003-0693-5504

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Date deposited: 03 Jan 2013 10:24
Last modified: 29 Oct 2019 01:44

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