中国科学院纳米系统与多级次制造重点实验室第111期学术报告 报告人:Natalie Stingelin(Imperial College London)
发布时间:2015-08-24
中科院纳米系统与多级次制造重点实验室
纳米论坛 ( NHF Forum No. 111)
第111期学术报告会通知
(详细介绍见附件, 简要通知如下)
报 告 人:Natalie Stingelin, Imperial College London, UK
题 目:Enabling ion flow in organic insulator:semiconductor blends for bioelectronics applications
时 间:2015年07月15日(星期三) 下午3:00
地 点:国家纳米科学中心,南楼二层会议室
主持人:魏志祥 研究员
报告内容:
In recent years, the bioelectronics field has seen the use of an increasing variety of conducting polymers.
One reason for this development is that ‘plastic’ semicondcutors promise to display tunable mechanical properties (flexibility) and the ability to form an intimate interface with living tissue – in strong contrast to their inorganic counterparts [1].
Even though transduction of ionic biosignals into electronic signals is thought to be the key mechanism for successful integration of electronic devices in biological systems, little insight has so far been gained that allows understanding the interplay of electronic and ionic conductivity in the currently employed materials [2].
Here we present a straight-forward and chemically inert materials science approach that addresses this challenge and promises to control mixed ionic/electronic transport in ‘plastics’ by blending organic semiconductors with insulating polymers.
This assists in inducing a more polar nature to the resulting systems and introduces the capability of controlling the interdiffusion of biological media through the final structures.
We will demonstrate that electronic transport can be maintained in such multicomponent systems upon blending with the insulating matrix.
Moreover, initial studies show faster switching response in large-scale organic electrochemical transistors (OECT) when using blend systems compared to devices fabricated with a single-component conducting layer.
This observation suggests our blend system shows efficient ionic conductivity.
We tentatively relate this desirable behavior of the semiconductor:insulator blends to the more polar nature of the latter active layers, introduced through the insulating (commodity) polymers, in addition to the swelling of the blend in the aqueous electrolyte.
We thus show that the use of conducting/insulating polymer blends has the potential to bring multifunctionality to the final material systems, including biological activity, biodegradation, topological cues, etc., which in turn promises to enable more specific interactions with biological systems.
欢迎感兴趣的老师、同学参加。
Beijing July 2015 -- Natalie Stingelin.doc