直播時(shí)間：2023年5月26日（周五）20:00-21:30

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北京時(shí)間2023年5月26日晚八點(diǎn)，iCANX Talks 第145期邀請(qǐng)到北卡羅來(lái)納州立大學(xué) Martin Thuo 教授分享如何簡(jiǎn)便易行做科研：用液滴探索亞納米級(jí)表面結(jié)構(gòu)。更多精彩，敬請(qǐng)期待！

【嘉賓介紹】

Martin Thuo

North Carolina state University

Frugal Science: Exploring Sub-Nanometer Scales using Droplets

【Abstract】

Liquids on surfaces, either as droplets or adsorbed films, embody both complexity and simplicity and, are erroneously portrayed as information poor or worse as an inconvenience. Thermodynamically, however, droplets capture surface force balance hence are a fascinating tool in understanding sub-nanometer surface structures. This talk will highlight how a simple relation of Gibbs free energy between a droplet and a self-assembled monolayer can be used to reveal gaps in our understanding of these ‘simple’ systems.

表面上的液體，無(wú)論是液滴還是吸附膜，既簡(jiǎn)單又復(fù)雜，還被錯(cuò)誤地描述為信息貧乏和不方便。然而，從熱力學(xué)上講，液滴捕獲表面力平衡，因此是理解亞納米表面結(jié)構(gòu)的一個(gè)有力的工具。本次演講將重點(diǎn)介紹如何利用一個(gè)簡(jiǎn)單的吉布斯自由能關(guān)系來(lái)揭示我們對(duì)這些“簡(jiǎn)單”系統(tǒng)的理解差距。

From the original work by Jacob Sagiv, the Whitesides-Porter discrepancy, to understanding superhydrophobic surfaces, we will explore the chemistry, challenges, and opportunities for new advances. Understanding the free energy minimized state of a droplet, we reveal complex interactions at the single carbon-carbon bond level and related conformational dynamics at the interface. Complimentary studies through surface sensitive sum-frequency generation and molecular electronics lead to strong indication that droplets are information rich under felicitous choice of conditions. This is an ultimate demonstration of frugal nanoscience!

從Jacob Sagiv的原始工作，Whitesides-Porter差異，到理解超疏水表面，我們將探索化學(xué)，挑戰(zhàn)和新進(jìn)展的機(jī)會(huì)。了解液滴的自由能最小化狀態(tài)，揭示了單碳-碳鍵水平的復(fù)雜相互作用和界面上相關(guān)的構(gòu)象動(dòng)力學(xué)。通過(guò)表面敏感和頻率產(chǎn)生和分子電子學(xué)的互補(bǔ)研究強(qiáng)有力地表明，液滴在適當(dāng)?shù)臈l件下信息是豐富的。這是節(jié)約納米科學(xué)的終極證明！

Besides their use as probes, liquid droplets are also good synthons for nanomaterials synthesis. This will be highlighted through a discussion on liquid-derived synthons for graphene-coated metal oxides. Utilizing droplets, we synthesize materials that are otherwise challenging to make.

除了用作探針外，液滴也是合成納米材料的好工具。這將通過(guò)對(duì)石墨烯涂層金屬氧化物的液體衍生合成物的討論來(lái)強(qiáng)調(diào)。利用液滴我們合成了原本很難制造的材料。

【BIOGRAPHY】

Martin Thuo is a Professor in the Departments of materials science & engineering at North Carolina state University and a co-host of the ICANX talks. Prior to NCSU, he was the Schafer professor at Iowa State University. He was also a Mary-Fieser (2009-2011) and NSEC (2011-2013) post-doctoral Fellow at Harvard University. He is the recipient of several awards including the ACS nano rising star, MSE excellence in research award, Lynn-Anderson research excellence award, Black & Veatch faculty fellowship, among others. His research interests encompass the general theme of frugal innovation through surface and interface thermodynamics.

Martin Thuo是北卡羅來(lái)納州立大學(xué)材料科學(xué)與工程系的教授，也是iCANX會(huì)議的聯(lián)合主持人。在加入北卡州立大學(xué)之前，他是愛(ài)荷華州立大學(xué)的Schafer professor，也是哈佛大學(xué)Mary-Fieser(2009-2011)和NSEC(2011-2013)博士后。Martin Thuo是多個(gè)獎(jiǎng)項(xiàng)的獲得者，包括ACS納米新星，MSE卓越研究獎(jiǎng)，Lynn-Anderson卓越研究獎(jiǎng)，Black & Veatch教師獎(jiǎng)學(xué)金等。他的研究方向包括通過(guò)表面和界面熱力學(xué)研究節(jié)約創(chuàng)新主題。

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