Nanowires PEDOT

Figure 10. SEM image of M11O2/PEDOT nanowires deposited at 0.75 V (a), TEM image of a nanowire (b), EDS elemental maps for S and Mn [(c) and (d)], and PEDOT shell thickness variations as a function of potential (e) (Scale bar 50 nm). Courtesy of Liu et al. Reprinted with permission from Liu and Lee.220 Copyright 2008 American Chemical Society.

Figure 10.6 Procedure for polymer nanowire fabrication. An aqueous PEDOTtPSS solution was spin-coated on a substrate patterned with a 1.3 ym period grating, then coated with a thin Si02 layer and a PDMS homopolymer brush. A PS-PDMS block-copolymer thin film was then spin-coated and solvent-annealed. The self-assembled block-copolymer patterns were transferred into the underlying PEDOT-.PSS film through a series of reactive ion etching steps employing CF4 and O2 plasmas. (Reprinted with permission from Nano Letters, Nanowire Conductive Polymer Gas Sensor Patterned Using Self-Assembled Block Copolymer Lithography by Y. S. Jung et al., 8, 11. Copyright (2008) American Chemical Society)...

In the first case, the tip serves both as monomer (and electrolyte) dehvery tool and as the cathode for the electrochemical polymerization, while the conductive substrate is the anode. The polymerized material with a well-defined pattern and shape is subsequently deposited on the substrate. Many kinds of CPNWs, e.g. PPY, PANI, and PEDOT nanowires have been prepared with this approach on (semi-)conducting substrates e.g. silicon, graphite, or gold, using STM or conductive AEM tips [17-21]. Figure 10.8 is an AFM... 

Besides nanoporous alumina template, nanoporous polycarbonate (PC) is another popular choice for the growth of CPNWs. PPV and PEDOT nanowires of a few hundred nanometers have been prepared by CVD and electrochemical methods, respectively, using PC templates [55,58],... 

Figure 10.39 An optical micrograph of a wire grown from aqueous EDOT/PSS solution. Inset a scanning electron micrograph of a PEDOT nanowire. The scale bars represent 10 pm except for those in the insets, which denote 500 nm. (Reprinted with permission from Applied Physics Letters, Directional growth of polypyrrole and polythiophene wires by P. S. Thapa, D.J. Yu,J. P. Wicksted eta ., 94, 3 (2009) American Institute of Physics)...

Figure 10.41 Sem i logarithmic plot of G for PEDOT nanowires. The square and circle...

PEDOT PSS nanowire (Figure 10.41) [101,102]. The temperature dependence of the resistance indeed followed Mott VRH for a 1-D system, i.e., p T) oc exp (TMott/T). Tiviott was determined to be 1900 K, which is similar to that of PEDOT PSS thin films. 

Very recently, Yin et al. applied this expression in a transport study of individual PPY, PANI nanotubes, and PEDOT nanowires [99]. The authors also found that the temperature- and field-dependent I-V characteristics of these nanoscale materials can be fitted very well with the expression. 

Figure 10.49 (a) Resistance response of 80-nm-wide PPY and PEDOT nanowires to analytes at 1000 ppm concentration, (b) Sensing responses from the two nanowires presented on a 2-D scatter plot. Moisture corresponds to 8% relative humidity at 23 °C. IPA stands for isopropyl alcohol. (Reprinted with permission from Advanced Materials, Precisely Defined Heterogeneous Conducting Polymer Nanowire Arrays - Fabrication and Chemical Sensing Applications by Y. Chen and Y. Luo, 21, 20, 2040-2044. Copyright (2009) Wiley-VCH)... 

Figure 10.57 Comparison of laser confocal microscope (LCM) PL spectra of an isolated single strand of doped and dedoped PEDOT nanowires without Raman modes. (Reprinted with permission from Synthetic Metals, ight emission of a single strand of poly(3,4-ethylenediox-ythiophene) (PEDOT) nanowire by D. H. Park, H. S. Kim, Y. B. Lee et a ., 158, 3—4. Copyright (2008) Elsevier Ltd)...

Y.Z. Long, J.L. Duvail, Z.J. Chen, A.Z. Jin, and C.Z. Gu, Electrical conductivity and current-voltage characteristics of individual conducting polymer PEDOT nanowires. Chin. Phys. Lett., 25, 3474-3477 (2008). 

Ethanol PEDOT/PSS Nanowires Cond. Nonlinear 10-100% saturation in N2... 

Kim et al. [118] electrodeposited 40-pm long, 100- or 200-nm thick PPy, PANI, and PEDOT nanowires on an Au surface using AAO templates with cylindrical nanopores. The diameters of the resulting nanowires were dictated by the pore sizes of the template used, with 100 nm pores resulting in 100 nm CP wires. The polymerization was initiated along the wall of the AAO template as the anionic template attracted cationic CP [131]. Consequently, instead of nanowires, nanotubes with wall thicknesses of 10-30 nm were formed initially. Then, as polymerization time increased, the nanotubes were filled to yield nanowires. 

Taggart, D.K., Yang, Y., Kung, S.C., Mcintire, T.M., Permer, R.M., 2011. Enhanced thermoelectric metrics in ultra-long electrodeposited PEDOT nanowires. Nano Lett. 11,125-131. 

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