2014
DOI: 10.1002/adfm.201304047
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Nanoparticle Growth via Concentration Gradients Generated by Enzyme Nanopatterns

Abstract: 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 ar… Show more

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Cited by 8 publications
(5 citation statements)
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“…Finally, the activity of poly(SET)-GOx patterns were visualized by formation of gold nanoparticles on the generated patterns as a result of reduction of gold ions by glucose oxidase ( Supplementary Figure 4b ). 19 The data together demonstrate that the direct write of these proteins with poly(SET) resulted in bioactive protein patterns.…”
Section: Resultsmentioning
confidence: 87%
“…Finally, the activity of poly(SET)-GOx patterns were visualized by formation of gold nanoparticles on the generated patterns as a result of reduction of gold ions by glucose oxidase ( Supplementary Figure 4b ). 19 The data together demonstrate that the direct write of these proteins with poly(SET) resulted in bioactive protein patterns.…”
Section: Resultsmentioning
confidence: 87%
“…MES is used as buffer in biological AuNP-mediated H2O2 detection where HAuCl4 is reduced by H2O2, and formation of AuNPs detected by UV-vis spectroscopy. [21][22][23][24] Even though it is often recognized that MES may itself reduce HAuCl4, the influence of the byproducts of this side-reaction on detection, or the biological systems themselves have not been considered. [21][22][23][24] One possible reason for the dearth of mechanistic studies is the complex progression of gold intermediates, making it difficult to predict the fate of the organic reducing agent as well as its influence on the optical (and other) properties of the AuNP sols.…”
Section: Introductionmentioning
confidence: 99%
“…[21][22][23][24] Even though it is often recognized that MES may itself reduce HAuCl4, the influence of the byproducts of this side-reaction on detection, or the biological systems themselves have not been considered. [21][22][23][24] One possible reason for the dearth of mechanistic studies is the complex progression of gold intermediates, making it difficult to predict the fate of the organic reducing agent as well as its influence on the optical (and other) properties of the AuNP sols. 2,25 Complicating the matter, all intermediates in gold nanostructure synthesis, including gold complexes 26 , nanoparticles 27,28 and nanoclusters 29 , are known catalysts for reactions, such as the oxidation of amines to imines, 30 oxidations with dioxygen, 27 and CO oxidation.…”
Section: Introductionmentioning
confidence: 99%
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“…Micro-and nanoscale patterned nanoparticle arrays have attracted significant attention. The arrays have been represented by several types of techniques, such as meniscus [22,23], chemical [24,25], electric force [26][27][28], optical force [29,30], microcontact printing (μCP) [31,32], and lithographical methods [33][34][35][36][37][38][39]. Although the μCP method is one successful technique, its processes are characterized by limiting factors for wide-range practical use, i.e., the preparation of specific microstamps and the deliberate selective deposition.…”
Section: Introductionmentioning
confidence: 99%