نتایج جستجو برای: conducting polymer

تعداد نتایج: 148025  

2001
H. X. He C. Z. Li N. J. Tao

We electrochemically deposit conducting polymer to bridge two closely placed electrodes, and then form a polymer nanowire by stretching the polymer bridge with the electrodes. During stretching, the conductance increases initially as the polymer chains are aligned in parallel, and then decreases in a stepwise fashion, due to abrupt changes in the nanowire thickness. We study the current– voltag...

Journal: :journal of physical & theoretical chemistry 2007
m. banimahd keivani m. aghaie r. ansari k. zare h. aghaiel

practical applications of conducting polymers such as polyaniline as membranes are particulary limitedbecause of their poor mechanical properties. however by mixing polyaniline with some conventional insulatingpolymers such as nylon and preparation composite films through solvent casting or blending, it seems to be asuitable way in order to increase the mechanical properties of the conducting p...

Journal: :journal of sciences, islamic republic of iran 2013
s. pirsa

determination of 1, 1-dimethylhydrazine (dmh) in air is carried out by spectrophotometry, gc or hplc analysis, but in this study dmh was analyzed by a gas sensor based on nanostructure conducting polyaniline. determination of dmh has been done very simplely and quickly in recent work. electrically conductive fibers have been prepared by polymerization of aniline on surfaces of commercial polyme...

Journal: :Materials Today Chemistry 2022

Owing to their diverse potentials help advance modern electronics and energy technologies, electrically conducting metal–organic frameworks (MOFs) have emerged as one of the most coveted functional materials within past decade. The key developing MOFs is equip them with mobile charge carriers facilitate long-range movement. Circumventing challenges unpredictability associated construction intri...

2008

Polymers can be prepared using chemical and/or electrochemical methods of polymerization (see Chap. 2), although most redox polymers have been synthesized by chemical polymerization. Electrochemically active groups are either incorporated into the polymer structure inside the chain or included as a pendant group (prefunctionalized polymers), added to the polymer phase during polymerization, or ...

2006
Saulius Grigalevicius Michael Forster Stefan Ellinger Katharina Landfester Ullrich Scherf

Excitation energy transfer from semi-conducting polymers to fluorescent dyes (or dye-labeled analytes) is commonly used in sensor applications, e.g., for DNA and protein sensing. Semi-conducting polymers show rather high absorption cross-sections and a high intra-chain mobility of the delocalized excitations leading to a high sensitivity for the excitation light. However, sensing of biological ...

پایان نامه :سایر - دانشکده علوم 1388

برای تهیه کامپوزیت های پلی پیرول در ابتدا پلیمر مورد نظر با کمک دوپنت شیمیایی سنتز شد. پتاسیم پرسولفات مورد استفاده به عنوان اکسیدان و آغازگر شیمیایی عمل کرده و پلیمر مورد نظر را ایجاد کرد. پس از تهیه پلیمر درصدها و مقادیر مختلف از اکسیدهای مورد نظر (اکسید روی نانو و میکرو، دی اکسید تیتانیوم نانو و میکرو) توزین گردیده و با مقادیر یکسان از پلیمر مخلوط گردید از طریق مخلوط کردن منحصرا فیزیکی و به ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید بهشتی - دانشکده علوم 1384

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