By a News Reporter-Staff News Editor at Electronics Newsweekly -- Investigators publish new report on Nanostructures. According to news originating from Chicago, Illinois, by VerticalNews correspondents, research stated, "Previous work has shown that nanoscale lamellar inorganic organic hybrid materials can be synthesized on transparent conductive substrates via the electrodeposition of Zn(OH)(2) in the presence of conjugated surfactants. These surfactants introduce p-type semiconducting supramolecular phases; thus, following conversion of the Zn(OH)(2) phase to the n-type semiconductor ZnO, the lamellar hybrids exhibit high photoconductive gains and can exhibit photovoltaic activity."
Our news journalists obtained a quote from the research from Northwestern University, "We report here on a family of carboxylated terthiophene-based surfactants designed with systematic modifications to molecular geometry, valency, and flexibility to investigate how these features affect the synthesis of the p-type/n-type semiconducting hybrid materials. We use scanning electron microscopy (SEM) and two-dimensional (2D) grazing-incidence X-ray diffraction (2D-GIXD) to correlate molecular features of the surfactants with growth and orientation of the nanoscale lamellae that form during electrodeposition on either hydrophilic or hydrophobic substrates. We find that molecularly flexible, monovalent terthiophene amphiphiles with linear geometries generate highly oriented and homogeneous films of the nanoscale hybrids, whereas T-shaped geometries, rigid molecules, or divalent surfactants tend to produce more heterogeneous and isotropically oriented lamellae under the same conditions. The critical aggregation concentrations (CAC) of the amphiphiles are higher than the concentrations used during electrodeposition, indicating that the growth and orientation of lamellar structures are mediated by surfactant-substrate interactions, rather than the assemblies they form in bulk solutions."
According to the news editors, the research concluded: "Molecular design in these hybrid systems is a key factor in optimizing function, since dense and macroscopically oriented growth is necessary in both photoconductivity and photovoltaic efficiency of solar cells."
For more information on this research see: Rationalizing Molecular Design in the Electrodeposition of Anisotropic Lamellar Nanostructures. Chemistry of Materials, 2013;25(21):4330-4339. Chemistry of Materials can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; Chemistry of Materials - www.pubs.acs.org/journal/cmatex)
The news correspondents report that additional information may be obtained from C.J. Bruns, Northwestern University, Inst BioNanotechnol Med, Chicago, IL 60611, United States. Additional authors for this research include D.J. Herman, J.B. Minuzzo, J.A. Lehrman and S.I. Stupp.
Keywords for this news article include: Chicago, Illinois, Nanoscale, Electronics, Photovoltaic, United States, Nanostructural, Nanostructures, Nanotechnology, Emerging Technologies, North and Central America
Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC