iCANX Talks 今晚八點直播︱ ACS Nano Rising Star!

北京時間9月4日晚8點

，大家期待已久的

iCANX Talks第二十一期

即將重磅來襲，本次邀請了三位頂尖學者為大家帶來最新科研成果。來自

清華大學的張瑩瑩教授

將

為我們帶來“

面向下一代柔性電子裝置的蠶絲和奈米碳材料研究

”的最新進展。

南洋理工大學的劉政教授

將為大家介紹

二維材料在構築清潔能源和低能耗的美麗新世界上的應用

。

美國普渡大學的Shelley Claridge 教授

將給大家帶來

近原子尺寸介面布圖的最新研究進展

。

The highly expected

iCANX Talks Vol.21

will be ceremoniously holed at

8:00 pm of September 4 (Beijing time).

This time， three top scholars were invited to bring you the latest scientific research reports。

Professor Yingying Zhang

from Tsinghua University

will discuss the progress on exploring the potential of silk and nanocarbon toward next-generation wearables。 And

the professor Liu Zhen from Nanyang Technological University

will introduce the use of 2D materials for sustainable word： electrocatalysis， low-power device and machine learning。 Meanwhile，

Prof. Shelley Claridge from Purdue University(USA)

will present the latest progress on patterning interfaces near the atomic limit。

在前20期的iCANX talks直播中，每一期都吸引了全球三十餘萬人觀看直播，累計收看觀眾已經近千萬人次，受到了國內外專家學者的普遍好評和追捧，目前，iCANX Talks已經成為極具國際影響力的高科技雲端學術峰會。

In the previous 20 weeks iCANX talks， every friday it attracted 300K+ audiences worldwide， totally close to 10 million。 iCANX has been highlighted by experts and audiences globally。 Now， iCANX Talks already becomes a well-known and popular international high-tech online event。

話不多說，先讓小艾給大家詳細介紹三位重磅嘉賓及演講內容吧！

Here comes the three abstracts & Bios of this Friday’s iCANX Talks！

報告1

Exploring the Potential of Silk and Nanocarbon toward Next-Generation Wearables

面向下一代柔性電子裝置的蠶絲和奈米碳材料研究

Yingying Zhang 張瑩瑩

Tsinghua University

清華大學

Abstract

The development of flexible electronics and equipment attracts significant interests in recent years。 It is of great importance to explore low cost and scalable preparation approaches for high performance flexible and wearable electronics。 Silkworm silk， with five thousand years’ usage history， is a popular natural material for clothes or wearing accessories。 In this talk， I will present our work on exploring the application of silk fiber/fabrics together with nanocarbons in flexible electronics。 We demonstrated that carbonized silk fabric with various woven structures， based on their unique N-doped graphitic carbon nanostructure and the macroscale woven structure， could be worked as strain sensors with both of high sensitivity and high tolerable strain。 We also demonstrated the fabrication of high performance silk E-skin， silk/graphene E-tattoos， silk based conductive wires and conductive silk-nanocarbon ink for printing electronic。 I hope that our work may help to extend the application of silkworm silk materials from traditional textile industry to next-generation wearable electronics and smart textiles。

近年來，柔性電子裝置的發展引起了人們的廣泛關注。探索高效能柔性和可穿戴電子器件的低成本、大規模製備方法具有重要意義。桑蠶絲，是一種具有五千年使用歷史的天然纖維材料，廣泛用於衣服或佩飾的製作。過去幾年，我們基於蠶絲材料和奈米碳材料開展研究，力圖開發其柔性電子領域的應用。例如，我們嘗試了將絲綢高溫碳化為碳織物材料，基於其獨特的氮摻雜石墨碳奈米結構和宏觀尺度編織結構，展示了其柔性感測領域的應用，實現了具有高靈敏度和大應變範圍的柔性應變感測器、織物基汗液分析貼片等高效能器件的製備。另外，實現了高效能蠶絲電子面板、蠶絲/石墨烯電子紋身、蠶絲基導電纖維以及用於印刷電子的蠶絲-奈米碳油墨的製備。我們希望，這些探索將有助於將蠶絲的應用從傳統紡織行業推廣到下一代可穿戴電子裝置與智慧織物，賦予這種古老材料新的生機。

Biography

Yingying Zhang is an associate professor at Tsinghua University。 She received her Ph。D。 degree in physical chemistry from Peking University in 2007。 From Jun。 2008 to Jun。 2011， she worked in Los Alamos National Laboratory （USA） as a postdoctoral research associate。 Then， she joined Tsinghua University in July of 2011。 Her lab focuses on the design and controlled preparation of nanocarbon， silk， and their hybrid materials， mainly aiming to develop high performance flexible electronics and wearable systems。 For example， Zhang’s lab reported nanocarbon-incorporated silk fibers with obviously enhanced the strength and toughness of the silk fibers obtained by directly feeding silkworms with diets coated with CNTs or graphene。 Furthermore， Zhang’s lab developed a 3D technique for printing of CNTs@silk core-sheath fibers on textile by employing a coaxial spinneret and demonstrated its applications in smart clothes。

Dr。 Zhang has authored more than 110 journal papers， including Nat Nanotechnol、Nat Commun、Sci Adv、PNAS、Matter、Adv Mater、JACS、ACS Nano、Nano Lett、Adv Funct Mater etc， with more than 4500 citations。 Besides， she has authored 1 book and 2 book chapters， and 15 awarded patents。 She has been supported/awarded by National Science Fund for Excellent Young Scholar （2014）， National Program for Support of Top-notch Young Professionals （2016）， and Young Scholars of Yangtze River scholar professor program （2017）。

張瑩瑩，清華大學副教授，博士生導師。2007年獲得北京大學博士學位，2008年6月至2011年6月在美國洛斯阿拉莫斯國家實驗室（Los Alamos National Laboratory）擔任博士後，2011年7月起任職於清華大學。她專注於奈米碳、蠶絲及其複合材料的設計和可控制備開展研究，致力於開發新型柔性可穿戴材料和高效能柔性電子器件。例如，曾經報道了“添食育蠶法”，透過給家蠶餵食添有奈米碳材料的桑葉，獲得了增強蠶絲；開發了同軸紡絲3D技術，實現了碳奈米管@蠶絲芯鞘纖維在織物上的直接製備，並展示了這種技術在智慧服裝上的應用；製備了絲蛋白-奈米碳“綠色”電子墨水，用於生物友好印刷電子器件的直接製備。共發表學術論文110餘篇，包括Nat Nanotechnol、Nat Commun、Sci Adv、PNAS、Matter、Adv Mater、JACS、ACS Nano、Nano Lett、Adv Funct Matter等，被引4500餘次。出版專著1本，參著書章2節，獲授權專利15項。曾獲國家優秀青年科學基金、萬人計劃青年拔尖人才、“長江學者獎勵計劃”青年學者等稱號或資助。

Keywords

Flexible Electronics 柔性電子

Wearable Electronics 可穿戴

Silkworm Silk 蠶絲

Natural Materials 天然材料

Nanocarbons 奈米碳材料

Sensors 感測器

Smart Textiles 智慧織物

報告2

2D materials for sustainable world: electrocatalysis, low-power device and machine learning

二維材料：構築清潔能源和低能耗的美麗新世界

Zheng Liu 劉政

Nanyang Technological University

南洋理工大學

Abstract

Using green energy or increase energy efficiency is the key to a sustainable world。 I will introduce the potentials of 2D materials to build a sustainable world in terms of low-cost H2 generation， low-power-consuming devices， and IA enabled optimization of novel materials。 Semiconducting catalysts are great candidates to replace noble metal to make green energy such as H2 due to their low cost。 Using 2D materials as the model system， we have revisited the semiconductor-electrolyte interface and unraveled a universal self-gating phenomenon through micro-cell based measurements 。 We unveiled a surface conductance mechanism that dominates the charge transport in semiconductor electrocatalysts。 Based on this， we provided a guideline on how to design high-performance semiconductor electrocatalyst。 Apart from the generation of green energy， we are also using 2D materials to build next-generation CMOS architecture， such as negative capacitance field-effect transistors， which may dramatically reduce the consumption of energy。 Finally， I will discuss our recent progress on the machine learning guided materials synthesis， as well as the novel design of neural networks hardware based on 2D materials。

利用清潔能源、提高能效，創造一個美好的新世界，是人類孜孜不倦的追求。本次報告將從兩個方面，展現二維材料在此過程中發揮的獨特的作用：

1） 在清潔能源方面，氫能源一直備受青睞。由於傳統貴金屬，比如Pt制氫的成本高昂，基於半導體材料的電化學析氫被廣泛研究。利用二維半導體材料作為模型催化體系，以及自制的微電化學系統，我們對其電解液和半導體催化劑介面的電荷輸運做了細緻研究，發現電催化過程自發誘導的表面電導是制約半導體催化劑效能的重要因素，此過程依賴於催化劑載流子型別以及厚度。基於此，針對不同催化反應，我們提出半導體材料的篩選策略，以此獲得高效能半導體催化劑。

2） 在能效方面，資訊與通訊行業成為全球第五大耗能產業，其能耗及碳排放數量佔全球總量的2%- 4%，其中主要用於矽基電晶體的運算。我們利用二維材料構建了新型的二維負電容電晶體，希望突破傳統矽基電子器件的熱力學極限，提升電子器件的能源利用效率。除此之外，人工智慧的發展也為解決能效問題提供了新的思路。最近，我們將其應用於材料合成，發現 人工智慧可以顯著的降低新材料合成和最佳化週期，大大提升材料生產效率。

Biography

Associate Professor Liu Zheng is an associate professor at MSE and EEE， NTU。 He works on the synthesis of high-quality and large-size novel 2D monolayers， especially transition metal dichalcogenides （TMDs） and their applications in electronics and catalysis。

Dr。 Liu is the recipient of the finalist of the World Technology Award in Energy category， Singapore NRF Fellowship， NTU Nanyang Assistant Professorship， ICON-2DMAT Young Scientist Award， Singapore Young Scientist Award （YSA）， Asia’s Rising Scientists， Nano Research Young Star Editors， Nanyang Research Award and Highly Cited researcher。 He held the Materials Research Society of Singapore Chair Professorship at NTU。

劉政教授於2005 年本科畢業於南開大學，2010 博士畢業於中科院國家奈米中心，之後在美國Rice 大學進行博士研究。2013年年底，入職新加坡南洋理工大學材料科學與工程學院和電子電氣工程學院。與現任南洋理工大學材料科學與工程學院副教授、新加坡材料學會講席教授。目前的主要研究方向為二維材料的合成以及器件和能源方面的應用。

所獲獎項包括：世界科技獎能源類最終提名，新加坡國立基金會會士， 南洋助理教授，新加坡青年科學家獎，ICON-2DMAT青年科學家，Asia’s Rising Scientists， Nano Research Young Star Editors，南洋研究獎，高被引科學家等。

Keywords

2D Materials 二維材料

Electrocatalysis 電催化

Low-power Device 低能耗

Green Energy 清潔能源

Semiconducting Catalysts 半導體催化

CMOS Architecture 二維負電容電晶體

Neural Networks Hardware 人工智慧

報告3

Patterning Interfaces Near the Atomic Limit: Lessons from the Cell Membrane

近原子尺寸介面布圖：源自細胞膜的啟迪

Professor Shelley Claridge

Shelley Claridge 教授

Purdue University, USA

美國普渡大學

Group website: www.chem.purdue.edu/claridge

課題組網站：www.chem.purdue.edu/claridge

Abstract

Many applications in modern materials science require surfaces with embedded chemical information at scales < 10 nm， to control interactions with light for energy conversion， to direct the flow of electrons， or to induce molecular recognition with receptor protein complexes on cell surfaces。 Lithographic patterning rapidly becomes more expensive at scales below 100 nm， and is limited in terms of the chemistry that can be patterned。 Conversely， biology generates a spectacular diversity of chemical patterns at few-nm scales， to control chemical and mechanical circuits that are central to biological function。 A fundamental transformation to the molecular constituents of cell membranes enables us to use them to pattern interfaces with resolution exceeding that available at cutting edge lithographic fabrication facilities。 We describe technological applications of the powerful chemical control enabled by this approach， from templating inorganic nanowires to scaffolding cell growth。

現代材料科學的許多應用需要在材料表面嵌入小於10 nm的化學資訊，以此來調控光能轉換，導引電子流，以及誘導細胞表面的受體蛋白複合物進行分子識別。但如系小於100 nm的介面圖，則印壓技術成本激增，限制了該技術在化學資訊布圖方面的應用。與印壓技術相對，為調控對生物功能至關重要的化學和機械反應，生物學衍生出了一系列驚人的奈米級化學圖案。探索思路向細胞膜分子構架的根本性轉變，使我們能夠利用該構架創繪先進印壓技術無法企及的介面圖形。從無機金屬線排布，到搭造細胞生長支架，我們已在多個科技領域描繪了這一強效化學調控技術。

Biography

Shelley Claridge received undergraduate degrees in mathematics and biochemistry from Texas A&M University， and subsequently worked as a software engineer for six years prior to completing a Ph。D。 at UC Berkeley with Paul Alivisatos and Jean Fréchet。 After a postdoctoral fellowship with Paul Weiss at UCLA， she joined the faculty at Purdue University in 2013， and was promoted to Associate Professor with tenure in 2019。 Her research at Purdue has been recognized with Young Investigator awards from NSF， DARPA （2017 Young Faculty Award and 2019 DARPA Director’s Fellowship）， 3M， and DuPont （one of 8 globally in 2016）， as well as emerging investigator recognitions from ACS Nano， Journal of the American Chemical Society， Chemical Communications， Analytical Methods， and Analytical and Bioanalytical Chemistry。 Work from her group has also been the subject of 2 granted patents and 6 additional pending patent applications to date。

Shelley Claridge於德州A&M大學獲得數學與生物學雙學士學位。以軟體工程師的身份工作六年後，進入UC Berkeley學習並完成Ph。D學業，師從Paul Alivisatos 和 Jean Fréchet。又於UCLA師從Paul Weiss完成博士後工作，於2013年任教普渡大學，2019年晉升為Associate Professor，取得終身教職。她在普渡的研究工作頗受認可，於多個機構獲得青年科學家獎 ：NSF；DARPA （Young Faculty Award， 2017； Director’s Fellowship， 2019；）；3M；DuPont （2016年全球8人之一）。作為科研新秀，她的研究工作頻頻見刊於ACS Nano，Journal of the American Chemical Society， Chemical Communications，Analytical Methods， and Analytical 和 Bioanalytical Chemistry等。她的課題組工作已有兩項獲批專利和六項待批專利。

Keywords

Patterning Interfaces 介面分佈

Near the Atomic Limit 近原子尺寸

Cell Membrane 細胞膜

Modern Materials 現代生物材料學

Molecular Recognition 分子識別

Biology 生物學

Inorganic Nanowires 無機金屬線

Scaffolding Cell Growth 細胞生長支架

當然，除了三位重磅嘉賓，我們的主持人陣容也十分強大，是來自

加州大學洛杉磯分校的Paul S Weiss教授和來自韓國標準與科學研究所（KRISS）高階研究員Miso Kim！