Synthesis of Continuous Conductive PEDOT:PSS Nanofibers by Electrospinning: A Conformal Coating for Optoelectronics

Abstract

A process to synthesize continuous conducting nanofibers were developed using PEDOT:PSS as a conducting polymer and an electrospinning method. Experimental parameters were carefully explored to achieve reproducible conductive nanofibers synthesis in large quantities. In particular, relative humidity during the electrospinning process was proven to be of critical importance, as well as doping post-treatment involving glycols and alcohols. The synthesized fibers were assembled as a mat on glass substrates, forming a conductive and transparent electrode and their optoelectronic have been fully characterized. This method produces a conformable conductive and transparent coating that is well-adapted to nonplanar surfaces, having very large aspect ratio features. A demonstration of this property was made using surfaces having deep trenches and high steps, where conventional transparent conductive materials fail because of a lack of conformability.

Poly(3,4‐ethylenedioxythiophene) Polymer Composite Bioelectrodes with Designed Chemical and Topographical Cues to Manipulate the Behavior of PC12 Neuronal Cells

“…For fabrication of the bioelectrodes, the PEDOT:PSS aqueous dispersion was mixed with dimethyl sulfoxide (DMSO) to improve the conductivity of the PEDOT:PSS matrix; [11] PEO was crosslinked with PSS to form sulfonic acid ester structures, thereby increasing the viscosity of the electrospinning solution; [12,13] and the addition of 3 wt% GOPS not only led to reaction with the cover glasses through the hydroxyl groups but also crosslinking with PSS through the methoxysilane unit and epoxy ring to improve the interfacial adhesion. [15] Thus, we suspect that the presence of PEO formed a stable interfacial layer of water that could exclude proteins or cells, while the scaffolds featuring the fibrous structures served as superior environments for cell attachment because of their nanoscale architectures, similar to extracellular matrix (ECM) in vivo. [15] Thus, we suspect that the presence of PEO formed a stable interfacial layer of water that could exclude proteins or cells, while the scaffolds featuring the fibrous structures served as superior environments for cell attachment because of their nanoscale architectures, similar to extracellular matrix (ECM) in vivo.…”

“…[15] Thus, we suspect that the presence of PEO formed a stable interfacial layer of water that could exclude proteins or cells, while the scaffolds featuring the fibrous structures served as superior environments for cell attachment because of their nanoscale architectures, similar to extracellular matrix (ECM) in vivo. [15] PC12 is a common cell model for research because it can differentiate into neuron-like cells when treated with nerve growth factor (NGF). [15] PC12 is a common cell model for research because it can differentiate into neuron-like cells when treated with nerve growth factor (NGF).…”

“…[14] Most importantly of all, we found that the flat PEO/PEDOT:PSS composite film fabricated through spin-coating formed a contact repulsion coating that limited cell attachment and proliferation, whereas the PEO/ PEDOT:PSS nanofibers fabricated through electrospinning from the same dispersion functioned as an efficient contact attraction coating that promoted neuron adhesion and allowed manipulation of the cell morphology. [15] Thus, we suspect that the presence of PEO formed a stable interfacial layer of water that could exclude proteins or cells, while the scaffolds featuring the fibrous structures served as superior environments for cell attachment because of their nanoscale architectures, similar to extracellular matrix (ECM) in vivo. [16][17][18] The pheochromocytoma 12 (PC12) cell line is derived from rat pheochromocytoma, a tumor arising from the chromaffin cells of the adrenal medulla.…”

“…[16][17][18] The pheochromocytoma 12 (PC12) cell line is derived from rat pheochromocytoma, a tumor arising from the chromaffin cells of the adrenal medulla. [15] PC12 is a common cell model for research because it can differentiate into neuron-like cells when treated with nerve growth factor (NGF). [19] NGF is the best-characterized member of the neurotrophin family responsible for survival, differentiation, and neurite outgrowth of sympathetic neurons by targeting tyrosine kinase A (TrkA), a member of the tyrosine receptor kinase (Trk) family.…”

Preparation and Thermoelectric Performance of Tellurium Nanowires-based Thin-Film Materials

“…。有机热电材料如聚苯胺(PANI) 、聚 3， 4-乙烯二氧噻吩/聚苯乙烯磺酸盐(PEDOT:PSS)等 具有柔性和轻质的特性 [10][11] ， 满足柔性热电材料的需 求，然而功率因子大多相对较低(~4.5 μW•m -1 •K -2 ) [12] ，制约了其在柔性热电领域的应用。因此，研究 者通过低维化和复合的方法来制备性能优异的柔性 热电材料 [13][14] 。Gao 等 [15] 利用碲纳米线复合还原氧 化石墨烯制备柔性薄膜，功率因子达到 80 μW•m -1 •K -2 。 Song 等 [16] 利 用 碲 纳 米 棒 复合 PEDOT:PSS 制备柔性热电薄膜，功率因子达到 50 μW•m -1 •K -2 。目前碲纳米材料与碳材料或有机热电材 料复合能够制备性能优异的柔性热电材料，但是碲 纳米材料本身的热电性能还有待进一步提高。See 等 [17] 采用水热法制备了碲纳米线，测试了碲纳米线薄 膜的热电性能，其电导率为 8 S•m -1 ，塞贝克系数为 408 μV•K -1 ，功率因子为 2.7 μW•m -1 •K -2 。Gao 等 [18] 利用高温液相法制备了碲纳米线，其薄膜电导率为 4…”