Conductivity of macromolecular networks measured by electrostatic force microscopy

Lei, C. H.; Das, A.; Elliott, M.; Macdonald, J. E.
July 2003
Applied Physics Letters;7/21/2003, Vol. 83 Issue 3, p482
Academic Journal
High-resolution electrostatic force microscopy (EFM)-phase measurements are reported on molecular networks of semiconductor polymer poly-hexylthiophene (P3HT) and DNA molecules. A lateral resolution of better than 20 nm is demonstrated in EFM-phase images of the P3HT network by detecting the phase shift of the tip along the molecules under electrical bias. Strands of l-DNA are shown to be highly insulating in comparison to the semiconductor polymer P3HT, with a minimum resistance of ∼1 × 10[SUP7]V cm.


Related Articles

  • Structural systematic features of photoelectric effect in aromatic polymers with polymethine dyes. Aleksandrova, E. // Semiconductors;Dec2007, Vol. 41 Issue 12, p1445 

    The structural systematic features of quantum-yield variation in charge-carrier photogeneration are investigated for polymer systems with molecules into which polymethine dyes of various structures had been introduced. The correlations between the quantum yields and the...

  • Force-extension curves of dimerized polyglutamic acid. Ikai, A.; Alimujiang, Y. // Applied Physics A: Materials Science & Processing;2001, Vol. 72 Issue 7, pS117 

    Abstract. Measurement of the force-extension curve for the mechanical unfolding process of a single protein molecule is expected to provide a value for the force necessary to deform the molecule. Integration of the observed curves can then yield an accurate estimate of the intra-molecular...

  • Cavity-enhanced stimulated emission cross section in polymer microlasers. Djiango, Martin; Kobayashi, Takeyuki; Blau, Werner J. // Applied Physics Letters;10/6/2008, Vol. 93 Issue 14, p143306 

    We report a cavity quantum electrodynamic enhancement of stimulated emission in polymer microlasers. The enhancement of the stimulated emission cross section is shown through the demonstration of laser action in the 40 μm diameter cylindrical microcavities whose total molecular population...

  • Optical transmission of polymer dispersed liquid crystals doped with carbon nanotubes. Sadovoy, A. V.; Nazvanov, V. F. // Technical Physics Letters;Aug2006, Vol. 32 Issue 8, p659 

    The optical transmission of polymer-dispersed liquid crystals (PDLCs) doped with multiwall carbon nanotubes (MWNTs) has been studied in comparison to the analogous system without MWNTs. The transmission of MWNT-doped PDLC cells in crossed polarizers exhibits an anomalous dependence on the...

  • Inducing and imaging single molecule dissociation on a semiconductor surface: H2S and D2S on.... Rezaei, M.A.; Stipe, B.C. // Journal of Chemical Physics;10/8/1998, Vol. 109 Issue 14, p6075 

    Investigates the induction and imaging molecule dissociation on a semiconductor surface. Use of variable-temperature, ultrahigh vacuum scanning tunneling microscope; Effect of sulfidation on the materials properties of alloys; Calculation of the activation barrier from the atomistic analysis of...

  • Switching phase separation mode by varying the hydrophobicity of polymer additives in solution-processed semiconducting small-molecule/polymer blends. He, Zhengran; Li, Dawen; Hensley, Dale K.; Rondinone, Adam J.; Chen, Jihua // Applied Physics Letters;9/9/2013, Vol. 103 Issue 11, p113301 

    Lateral and vertical phase separations play critical roles in the performance of the next-generation organic and hybrid electronic devices. A method is demonstrated here to switch between lateral and vertical phase separations in semiconducting 6,13-bis(triisopropylsilylethynyl) pentacene (TIPSE...

  • Micro-patterning of multiple organic molecules by laser implantation. Goto, M.; Hobley, J.; Oishi, T.; Kasahara, A.; Tosa, M.; Yoshihara, K.; Kishimoto, M.; Fukumura, H. // Applied Physics A: Materials Science & Processing;2004, Vol. 79 Issue 1, p157 

    Micrometer pixelated arrays comprised of different functional organic molecules were formed on a polymer film using a laser implantation and transfer dry processing technique. The spatial distribution of the implanted organic molecules and the extended pattern that they formed could be...

  • Highly conductive self-assembled nanoribbons of coordination polymers. Welte, Lorena; Calzolari, Arrigo; Felice, Rosa Di; Zamora, Felix; Gómez-Herrero, Julio // Nature Nanotechnology;Feb2010, Vol. 5 Issue 2, p110 

    Organic molecules can self-assemble into well-ordered structures, but the conductance of these structures is limited, which is a disadvantage for applications in molecular electronics. Conductivity can be improved by using coordination polymers—in which metal centres are incorporated into...

  • Theoretical study of the three-phase contact line and its tension in adsorbed colloid-polymer mixtures. Vandecan, Yves; Indekeu, Joseph O. // Journal of Chemical Physics;3/14/2008, Vol. 128 Issue 10, p104902 

    We perform a theoretical study of the three-phase contact line and the line tension in an adsorbed colloid-polymer mixture near a first-order wetting transition, employing an interface displacement model. We use a simple free-energy functional to describe a colloid-polymer mixture near a hard...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics