Nanoparticle growth via concentration gradients generated by enzyme nanopatterns
De La Rica, Roberto and Bat, Erhan and Herpoldt, Karla L. and Xie, Hai-nan and Bertazzo, Sergio and Maynard, Heather D. and Stevens, Molly M. (2014) Nanoparticle growth via concentration gradients generated by enzyme nanopatterns. Advanced Functional Materials. 3692–3698. ISSN 1616-301X (https://doi.org/10.1002/adfm.201304047)
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Biomineralizing organisms can grow nanomaterials with unexpected morphologies in an organic matrix where temporal and vectorial gradients of crystal growth precursors are established. Here, concentration gradients for the crystallization of gold nanoparticles are generated and applied on silicon substrates. Gradients of crystal growth precursors are generated by enzymes patterned as lines that are separated by distances ranging from the micro- to the nanoscale. The concentration of crystallization precursors around the lines separated by nanometric distances is not only determined by mass transport and enzyme activity but also by the nanoscale organization of biocatalysts. This nanoscale organization favors non-classical crystal growth conditions that lead to the formation of nanoparticle clusters containing nanocrystals that are highly crystallographically aligned. The combination of bottom-up crystal growth with top-down electron beam lithography enables the fabrication of micrometric patterns containing gold nanoparticles of different size, shape, and surface density. These are all critical parameters that determine the physical properties of these nanomaterials.
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Item type: Article ID code: 49012 Dates: DateEvent25 June 2014Published26 February 2014Published OnlineSubjects: Science > Chemistry
Science > PhysicsDepartment: Faculty of Science > Pure and Applied Chemistry Depositing user: Pure Administrator Date deposited: 06 Aug 2014 15:09 Last modified: 08 Apr 2024 21:37 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/49012