RUI: Electrostatic Generation and Characterization of Conducting Polymer Nanofibers: Motivating Undergraduate Students towards Research in Materials Science

RUI：导电聚合物纳米纤维的静电产生和表征：激励本科生进行材料科学研究

• 批准号: 0098603
• 负责人: Nicholas Pinto
• 金额: $ 21万
• 依托单位: University of Puerto Rico at Humacao
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-04-01 至 2004-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0098603&HistoricalAwards=false
• 关键词: RUI; Electrostatic; Generation; Characterization; Conducting

This proposal presents a simple technique to controllably and reproducibly produce ultrafine fibers of conducting polymers. Many factors that control fiber diameter (like solvent viscosity) using this technique (electrospinning) will be investigated so that fibers with average diameters 100 nm (1 nm = 10 -9 m) can be prepared. Electrospinning involves a high voltage source, a metal cathode collector and a glass pipette with the polymer solution to be electrospun. Single fibers will be captured on heavily doped silicon oxide coated wafers. The surface morphology will be studied with an optical microscope, a scanning electron microscope, a transmission electron microscope and an atomic force microscope. Fiber diameters and possible polymer chain alignment will be studied using these methods. Single fibers will also be characterized electrically via dc and ac conductivity measurements as a function of temperature. The PI's will study how the conduction mechanisms in these nanofibers differ from that in the bulk and could provide insights into the importance of interchain coupling that lead to charge delocalization. Finally, the fibers will be studied to check if the dc conductivity can be affected by applying a voltage to the heavily doped silicon. The purpose is to explore the possibility of fabricating nanodevices based on field effects, like nanoelectronic p.n junctions, Schottky junctions or field effect transistors (FET's).%%%This project in materials research is directed at helping underrepresented students in academia to participate in scientific research during their undergraduate years. The equipment requested in this proposal will strengthen the institutional infrastructure and also have a broader impact of improving the research facilities on the South-East part of the island.

提出了一种可控制、可重复生产导电聚合物超细纤维的简单技术。利用静电纺丝技术（静电纺丝）将研究控制纤维直径的许多因素（如溶剂粘度），从而可以制备平均直径为100 nm （1 nm = 10 -9 m）的纤维。静电纺丝包括一个高压源、一个金属阴极收集器和一个装有待静电纺丝聚合物溶液的玻璃移液管。单纤维将被捕获在重掺杂氧化硅涂层晶圆上。将用光学显微镜、扫描电子显微镜、透射电子显微镜和原子力显微镜研究其表面形貌。纤维直径和可能的聚合物链排列将使用这些方法进行研究。单纤维也将通过直流和交流电导率测量作为温度的函数来表征。PI将研究这些纳米纤维中的传导机制与本体中的传导机制有何不同，并可以深入了解导致电荷离域的链间耦合的重要性。最后，将研究光纤的直流导电性是否可以通过对高掺杂硅施加电压来影响。目的是探索基于场效应制造纳米器件的可能性，如纳米电子p.n结、肖特基结或场效应晶体管（FET）。这个材料研究项目旨在帮助学术界中代表性不足的学生在本科阶段参与科学研究。%%%这项建议所要求的设备将加强体制基础设施，并对改善该岛东南部的研究设施产生更广泛的影响。