直播預告|維茲曼科學研究所博士講述分子電子學

原文地址：http://news.sciencenet.cn/htmlnews/2023/9/508107.shtm

直播時間：2023年9月8日（周五）20:00-21:30

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北京時間2023年9月8日晚八點，iCANX Talks 第160期邀請到維茲曼科學研究所的 Ayelet Vilan 博士進行分享！更多精彩，敬請期待！

【嘉賓介紹】

Ayelet Vilan

Weizmann Institute of Science

Molecular Electronics: An Electrostatic Perspective

【Abstract】

Our digital era is dominated by information coded using (mostly) current of electrons through inorganic, crystalline materials. Biology on the other hand, encodes information via electrostatic potential across molecular membranes. The magnitude of molecular electrostatic potential is unprecedented in standard inorganic electronic materials. For example, aligning a moderate molecular dipole in an array, as in self-assembled monolayer, is equivalent to a giant electric field (∼1 GV/m) that will lead of dielectric break down of most inorganic (oxides) insulators. Research on molecular electronics mainly follows the first approach, exploring the sensitivity of current to the quantized nature of molecules. I would like to suggest a complementary perspective, which is focused on elucidating and manipulating the potential profile along the current path. My talk will overview various electrostatic aspects of molecular monolayers, from modifiers of potential barrier between bulk materials, via charge-balance at organic / inorganic interface and up to deducing potential profiles from analysis of experimentally-measured current-voltage curves. These concepts could find relevance to diverse fields from renewable energy materials to bio-sensors.

我們的數字時代基本上是通過無機晶體材料中的電子流編碼信息來實現的。另一方面，生物學通過分子膜上的靜電勢來編碼信息。分子靜電勢的大小在標準無機電子材料中是前所未有的。例如，將中等分子偶極排列成陣列（如自組裝單層）就相當于一個巨大的電場（∼1 GV/m），這將導致大多數無機（氧化物）絕緣體的介電分解。分子電子學研究主要采用第一種方法，探索電流對分子量子化性質的敏感性。我想提出一個互補的視角，即側重于闡明和操縱電流路徑上的電位曲線。我的演講將從靜電的角度來概述單分子層，從塊狀材料之間的電位勢壘調節器，到有機/無機界面的電荷平衡，直至通過分析實驗測量的電流-電壓曲線推導出電位曲線。這些概念可應用于從可再生能源材料到生物傳感器等多個領域。

【BIOGRAPHY】

Dr. Ayelet Vilan studies molecular electronics at the Weizmann Institute of Science, in Israel. Her Ph.D. thesis (Materials and Interfaces department at the Weizmann Institute of Science, 2002) explores dipolar monolayers at the Au/GaAs surface. After a post-doctoral study at Philips Research (Eindhoven), she returned to the Weizmann institute in 2005. She worked as a visiting scientist in Texas A&M (2013-4). Her research interests encompass self-assembled monolayers, construction of molecular junctions and chemical and physical surface characterization. She focuses on the development of empirical tools for the interpretation and the quantification of charge transport across molecular junctions, in either single molecule or monolayer configurations.