| Autor: |
Pavana Siddhartha Kollipara, Yuanyue Liu, Yuebing Zheng, Matthew S. Ide, Pranaw Kunal, Vaibhav Bahadur, Bharath Bangalore Rajeeva, Karalee Jarvis, Minwoong Joe, Simon M. Humphrey, Palash V. Acharya |
| Rok vydání: |
2019 |
| Předmět: |
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| Zdroj: |
SSRN Electronic Journal. |
| ISSN: |
1556-5068 |
| DOI: |
10.2139/ssrn.3372970 |
| Popis: |
Accumulation-mediated chemical reactions are a ubiquitous phenomenon in nature. Herein, we explore microbubble-induced accumulation of precursor ions to achieve surfactant-free synthesis of immiscible metallic nanoalloys and to simultaneously pattern the nanoalloys into targeted architectures for their enhanced catalytic applications. We name our approach as a unified spatiotemporal synthesis and structuring (US3) strategy, wherein millisecond-scale accumulation of the precursor ions in a highly confined laser-mediated microbubble trap (MBT) drives ultra-fast alloy synthesis in sync with the structuring process. As a case-in-point, we employ US3 strategy for the in-situ surfactant-free synthesis and patterning of traditionally immiscible rhodium-gold (RhAu) nanoalloys. Stochastic random walk simulations justify the millisecond-scale accumulation process, leading to a 3-order reduction in synthesis time. The catalytic activity and structure-property relationship of the structured nanoalloys were evaluated using the reduction of p-nitrophenol with NaBH4. Our in-situ synthesis and structuring strategy can be translated for high-throughput production and screening of multi-metallic systems with tailored catalytic, opto-electronic, and magnetic functions. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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