Kinetic and Thermodynamic Hysteresis in Clustering of Gold Nanoparticles: Implications for Nanotransducers and Information Storage in Dynamic Systems,ACS Applied Nano Materials

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Kinetic and Thermodynamic Hysteresis in Clustering of Gold Nanoparticles: Implications for Nanotransducers and Information Storage in Dynamic Systems
ACS Applied Nano Materials ( IF 5.3 ) Pub Date : 2020-09-14 , DOI: 10.1021/acsanm.0c02249
Joscha Kruse ₁ , Stefan Merkens ₂ , Andrey Chuvilin _{2,

3} , Marek Grzelczak ₁

Affiliation

Hysteresis is an essential attribute of many solid-state devices and biological processes, yet it is often overlooked in colloidal and soft-matter dynamic systems. Herein, we show that gold nanoparticles can remain dispersed or aggregated at the same temperature depending on the trajectory of applied stimulus, featuring hysteretic behavior. Aided by real-time analytics and fine-tuning of experimental parameters, such as salt concentration, nanoparticle diameter, and surface potential, we disentangled the kinetic (rate-dependent) and thermodynamic (rate-independent) components of hysteresis in cyclic clustering of nanoparticles. The hysteresis originates from the difference in the aggregation and disassembly temperatures. Our findings enrich the repertoire of the experimental framework with potential for stimuli-sensitive nanotransducers, information storage, switchable catalysis, or autonomous chemical networks with feedback loops.

中文翻译：

金纳米粒子簇的动力学和热力学滞后：对纳米换能器和动态系统中的信息存储的影响。

磁滞是许多固态设备和生物过程的基本属性，但在胶体和软物质动力学系统中常常被忽略。在本文中，我们表明，金纳米颗粒可以在相同的温度下保持分散或聚集，这取决于所施加的具有滞后行为的刺激轨迹。在实时分析和实验参数（例如盐浓度，纳米颗粒直径和表面电势）的微调的辅助下，我们解开了纳米颗粒循环簇集中的磁滞的动力学（与速率有关）和热力学（与速率无关）分量。滞后源于聚集和分解温度的差异。我们的发现丰富了实验框架的全部内容，并具有刺激敏感的纳米换能器的潜力，

更新日期：2020-09-25

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