Self-assembled thin films from lamellar metal disulfides and organic polymers

Ollivier, Patricia J.; Mallouk, Thomas E.; Kovtyukhova, Nina I.; Keller, Steven W.

doi:10.1039/a801454j

Cited by 49 publications

(44 citation statements)

References 12 publications

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“…[9][10][11] The electronic, optical, photo-electrochemical, photoconductive, photovoltaic, thermal and sensing, for example, gas sensing and biosensing, properties of PANI could be improved by incorporating PANI with polystyrene latex, multiwalled carbon nanotubes, single-walled nanotubes, montmorillonite, graphite, MCM-41, TiO 2 and SnO 2 micro and nanoparticles. [9][10][11][12][13][14][15][16][17][18] PANI composites have also been shown to possess a variety of unique mechanical, electrical and structural properties because of synergistic effect from intimate mixing between PANI and inorganic or organic components at a molecular and an atomic level.…”

Section: Introductionmentioning

confidence: 99%

Evaluating the chemio-physio properties of novel zinc oxide–polyaniline nanocomposite polymer films

Alvi

Ram

Gómez

et al. 2010

Polym J

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Recently, polymer matrix-based nanocomposites have become a prominent area of research and development in optics, as well as in optoelectronic, biomedical, electrical and electronic applications. Organic polymer-based electronic devices have the potential to be lower in cost and more flexible in the manner in which they are manufactured. However, they need significant improvement in both efficiency and long-term stability. Therefore, we made an attempt to synthesize zinc oxide (ZnO)-polyaniline (PANI) using chemical and emulsion polymerization techniques. The properties of ZnO-PANI films were then systematically characterized with several physical techniques. Electrochemical investigations revealed that the individual redox properties of ZnO and PANI can be maintained in a nanocomposite ZnO-PANI system. Furthermore, our results indicated that ZnO-PANI films can exhibit a wide redox potential window. Moreover, we observed the formation of a single-layer nano-Schottky junction in ZnO-PANI films, and interesting positive temperature coefficient properties in ZnO-PANI-embedded polystyrene films. Polymer Journal ( INTRODUCTIONIn recent years, there has been considerable interest among researchers to develop novel inorganic _ organic hybrid materials with compositions modulated on the nanoscale because of their many potential applications in display technologies, microelectronics, catalysis, sensors and molecular electronics. 1 The fabrication of nanocomposite films by wet chemical techniques has been proven to be a more simple and inexpensive strategy than technologically demanding physical methods. 2 Recently, Ram et al. [3][4][5][6][7][8] developed metal oxide and conducting polymer nanocomposite films of TiO 2 -PANI, TiO 2 -polypyrrole, SnO 2 -polyhexylthiophene, TiO 2 -poly (thiopheneaniline) nanocomposite, Mn-Ferrite-PANI and MWCNT-poly (o-anisidine) using wet chemical methods and used them extensively in gas sensing and molecular electronics applications. PANI is one of the most widely studied materials because of its unique electrochemical, chemical and physical properties. In addition, PANI exhibits high electrical conductivity and good environmental stability in both doped and pristine (undoped) states. 9-11 The electronic, optical, photo-electrochemical, photoconductive, photovoltaic, thermal and sensing, for example, gas sensing and biosensing, properties of PANI could be improved by incorporating PANI with polystyrene latex, multiwalled carbon nanotubes, single-walled nanotubes, montmorillonite, graphite, MCM-41, TiO 2 and SnO 2 micro and nanoparticles. 9-18 PANI composites have also been shown to possess a variety of unique mechanical, electrical and structural properties because of synergistic effect from intimate mixing

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Section: Introductionmentioning

confidence: 99%

Evaluating the chemio-physio properties of novel zinc oxide–polyaniline nanocomposite polymer films

Alvi

Ram

Gómez

et al. 2010

Polym J

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“…As a result of the layerby-layer deposition, the as-synthesized films have a multilayer structure consisting of the MoS 2 nanosheet monolayer and the cationic polymer [28]. A successful growth fabrication using the technique in this study was monitored by UV-Vis absorption spectra, as shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Namely, stacking the MoS 2 nanosheets restores the lamellar structure, similar to a bulk material, resulting in the emergence of the bulk-like properties [24,26,27] [28]. This technique is advantageous for fine control, in terms of thickness and combinations, which is useful for the rational design of a nanoenvironment around the exfoliated MoS 2 nanosheets.…”

Section: Introductionmentioning

confidence: 99%

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Electronic, Structural, and Electrochemical Modulation of Electrostatic Self-Assembled 1T-MoS2 Nanosheets via Topotactic Structural Conversion

Fukuda

Nakata

Morita

et al. 2015

e-J. Surf. Sci. Nanotech.

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We studied the electronic, structural, and electrochemical modulation of electrostatic self-assembled thin films in which a nanoscale pair of single layer 1T-MoS2 nanosheets and charge-compensating polymers as a counterpart in the self-assembly process stacked up on the substrate after heating. Heating the self-assembled monolayer and multilayers of the 1T-MoS2 nanosheets at 300• C under vacuum triggered a yellow coloration and structural transformation, referred to as the 1T→2H transition, without a significant morphological change. In the topotactic conversion, an energy shift of the Mo 3d and S 2p core levels to a higher binding energy corresponds to the edge shift of the valence band, indicating the unique nature of this system as a MoS2 molecule. The single layer state, which is often modulated by stacking the metallic-like 1T-MoS2 nanosheets and the semiconductor 2H-MoS2 nanosheets, was retained in the multilayers due to the robust interlayer galleries filled by the polymers. Cyclic voltammograms of a Li-ion battery using the 1T-or 2H-MoS2 multilayer film electrodes provided useful information on the electrochemical reaction of the MoS2 slabs, especially at the early stage of electrochemical Li insertion. These self-assembled ultra-thin films, offering well-defined MoS2 nanosheet structures in terms of stacking order and crystal structure, will promote future applications of the single-layer 1T-and 2H-MoS2 nanosheets.

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“…After reassembling these nano sheets originated from different host inorganic oxides the obtained bulk composites may appear the special and extraordinary functions in chemical, physical, optical, electronic and/or mechanical properties compared to the layer-structured host oxides. [5][6][7][8] Sodium cobaltite, one of the layered oxides, exhibits considerably good thermoelectric performance due to the strong electron-electron correlation. [9][10][11] The CoO 2 À layers are thought to be responsible for the hole conduction and rather large Seebeck coefficient while the non-stoichiometric Na þ layers for low thermal conductivity due to the phonon confusion.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Thermoelectric Properties of NaxCoO2/Co3O4 Layered Nano-Composite

et al. 2005

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Self-assembled thin films from lamellar metal disulfides and organic polymers

Cited by 49 publications

References 12 publications

Evaluating the chemio-physio properties of novel zinc oxide–polyaniline nanocomposite polymer films

Evaluating the chemio-physio properties of novel zinc oxide–polyaniline nanocomposite polymer films

Electronic, Structural, and Electrochemical Modulation of Electrostatic Self-Assembled 1T-MoS<sub>2 </sub>Nanosheets via Topotactic Structural Conversion

Preparation and Thermoelectric Properties of Na<I><SUB>x</SUB></I>CoO<SUB>2</SUB>/Co<SUB>3</SUB>O<SUB>4</SUB> Layered Nano-Composite

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