Reversible Clustering of Gold Nanoparticles under Confinement |
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| Authors: | Ana Sánchez‐Iglesias Nathalie Claes Dr. Diego M. Solís Dr. Jose M. Taboada Prof. Sara Bals Prof. Luis M. Liz‐Marzán Dr. Marek Grzelczak |
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| Affiliation: | 1. CIC biomaGUNE, CIBER-BBN, Donostia-San Sebastián, Spain;2. Electron Microscopy for Materials Science (EMAT), Department Physics, University of Antwerp, Antwerp, Belgium;3. Departamento de Teoría de la Se?al y Comunicaciones, University of Vigo, Vigo, Spain;4. Departamento de Tecnología de los Computadores y de las Comunicaciones, University of Extremadura, Cáceres, Spain;5. Ikerbasque, Basque Foundation for Science, Bilbao, Spain;6. Donostia International Physics Center (DIPC), Donostia-San Sebastián, Spain |
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| Abstract: | A limiting factor of solvent‐induced nanoparticle self‐assembly is the need for constant sample dilution in assembly/disassembly cycles. Changes in the nanoparticle concentration alter the kinetics of the subsequent assembly process, limiting optical signal recovery. Herein, we show that upon confining hydrophobic nanoparticles in permeable silica nanocapsules, the number of nanoparticles participating in cyclic aggregation remains constant despite bulk changes in solution, leading to highly reproducible plasmon band shifts at different solvent compositions. |
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| Keywords: | mesoporous silica nanoparticles self-assembly surface plasmon resonance tomography |
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