Untitled

Malik, Sudip; Batabyal, Sudip Kumar; Basu, C.; Nandi, Arun K.

doi:10.1023/a:1024903428351

Cited by 15 publications

(16 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With addition of clay the 516 nm peak shifts to lower wavelength (blue shift). The blue shift is maximum at 2.5% clay content, and it is similar to the blue shift in the UV−vis spectra of cadmium sulfide (CdS) embedded P3HT nanowire . Probably a different structure of P3HT in the composite than that of pure P3HT may be the reason for its absorption at lower wavelength.…”

Section: Resultssupporting

confidence: 62%

“…The blue shift is maximum at 2.5% clay content, and it is similar to the blue shift in the UV-vis spectra of cadmium sulfide (CdS) embedded P3HT nanowire. 36 Probably a different structure of P3HT in the composite than that of pure P3HT may be the reason for its absorption at lower wavelength. It may arise due to both intrachain and interchain mechanisms.…”

Section: Resultsmentioning

confidence: 99%

“…Here it is necessary to mention that in the CdS embedded P3HT nanowire (showing blue shift) a decrease in conductivity of the nanowire containing film by two orders was observed. 36 A probable reason for this anomalous behavior may be proposed is that the blue shift in UV-vis spectra is mainly due to the intrachain contribution arising due to induced rigidity which increases the band gap of P3HT in the PNCs. As a result, the conductivity should decrease; rather, it remains the same.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Physical, Mechanical, and Conductivity Properties of Poly(3-hexylthiophene)−Montmorillonite Clay Nanocomposites Produced by the Solvent Casting Method

2004

View full text Add to dashboard Cite

Polymer nanocomposites (PNCs) of poly(3-hexylthiophene) (P3HT) with organically modified montmorillonite (om-MMT) clay have been prepared by the solvent casting method. WAXS and TEM studies indicate exfoliated clay structure for lower clay content, but at higher clay content (5%, w/w) intercalated structures appear. The interchain lamella of P3HT exists in the nanocomposite, and the P3HT crystals become more ordered, showing better X-ray diffraction peaks. The thermal stability of PNCs increases significantly, and 1% clay content PNC exhibits the maximum thermal stability. The glass transition temperature (T g), β-transition temperature (Tβ), the melting point (Tm), and the enthalpy of fusion (∆H) of the PNCs are increased as compared to those of pure P3HT. The storage modulus (G′) of PNCs showed a dramatic increase from that of pure P3HT, and the increase is larger in the temperature range 20-50 °C. The FTIR study indicates a decrease in Si-O-Si and Si-O stretching frequency for the exfoliated clay structure. The UV-vis study showed a blue shift of the π-π* transition band of P3HT in the PNCs, and they exhibit photoluminescence quenching which increases with increase in clay concentration. The dc conductivity of undoped PNCs remains almost the same as that of pure P3HT, but iodine-doped PNCs, however, exhibit 2.5-3 times greater conductivity than that of iodine-doped P3HT.

show abstract

Section: Resultssupporting

confidence: 62%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Physical, Mechanical, and Conductivity Properties of Poly(3-hexylthiophene)−Montmorillonite Clay Nanocomposites Produced by the Solvent Casting Method

2004

View full text Add to dashboard Cite

show abstract

“…The conducting polymers are important materials for their electroactive properties and are also capable of reducing the metal ions into metal nanoparticles. [30][31][32][33][34][35][36][37][38][39] Among the conducting polymers, polyaniline (PANI) is an important member whose emeraldine base (EB) form is oxidized to its pernigraniline base (PB) form by the metal ions. 40,41 However, one disadvantage of this polymer is that it is insoluble, so a substituted polyaniline [poly(o-methoxy aniline) (POMA)] would be a better choice for the preparation of metal nanocomposites in aqueous medium.…”

Section: Introductionmentioning

confidence: 99%

Enhanced optoelectronic properties of RNA–poly(o-methoxyaniline) hybrid containing monodispersed Au nanoparticles

2010

View full text Add to dashboard Cite

“…Recently, the electronic properties of conducting polymers are used to reduce the metal ions into metal nanoparticles. − Polyaniline(PANI) is an important conducting polymer which can undergo redox process very easily where its emeraldine base (EB) form is oxidized to its pernigraniline base (PB) form by the metal ions. , One disadvantage of this polymer is that it is insoluble, so a substituted polyaniline [poly( o -methoxyaniline) (POMA)] would be a better choice for the reduction of the metal ions due to its solubility in both aqueous and organic media. ,, …”

Section: Introductionmentioning

confidence: 99%

RNA−Poly(o-methoxyaniline) Hybrid Templated Growth of Silver Nanoparticles and Nanojacketing: Physical and Electronic Properties

2009

View full text Add to dashboard Cite

Three nanobiocomposites (PRAg31, PRAg11, and PRAg13; the numbers indicate the weight ratios of poly(o-methoxyaniline) (POMA) and ribonucleic acid (RNA), respectively), produced from the same amount of POMA (P) and silver nitrate (AgNO(3)) with differing proportions of RNA (R) are prepared by aging the aqueous solutions of the mixture for 3 weeks at 30 degrees C. The scanning and transmission electron microscopy (SEM and TEM) indicate Ag nanoparticle formation on the hybrid fiber surface and in the PRAg31 system the hybrid fibrils become coated with metallic Ag, the phenomenon being termed as "nanojacketting". The circular dichroism (CD) spectra indicate a small distortion of RNA conformation from A helix toward B helix. FTIR and UV-vis spectra suggest that POMA (emeraldine base, EB) being doped by Ag(+) become oxidized to its pernigraniline base (PB) form and reduce Ag(+) to metallic Ag. The Ag nanoparticles thus produced become stabilized on the fibril surface by co-ordination through nitrogen atoms of POMA (PB) chains. The much slower red shift of pi band to polaron band transition peak in PRAg31 than that of the other two nanobiocomposites is indicative of difficulty in conformational transitions of POMA chain in the "nanojacketted" hybrid fibrils. The dc-conductivity values of the nanobiocomposites are two orders higher than that of the pure POMA-RNA hybrids. The PRAg31 system exhibits rectification property in the I-V characteristic curves and a probable explanation based on the feasibility of p-n junction formation arising from the transfer of lone pair of electrons of nitrogen of POMA (p-type) to the Ag nanoparticles (n-type) has been offered.

show abstract

Untitled

Cited by 15 publications

References 12 publications

Physical, Mechanical, and Conductivity Properties of Poly(3-hexylthiophene)−Montmorillonite Clay Nanocomposites Produced by the Solvent Casting Method

Physical, Mechanical, and Conductivity Properties of Poly(3-hexylthiophene)−Montmorillonite Clay Nanocomposites Produced by the Solvent Casting Method

Enhanced optoelectronic properties of RNA–poly(o-methoxyaniline) hybrid containing monodispersed Au nanoparticles

RNA−Poly(o-methoxyaniline) Hybrid Templated Growth of Silver Nanoparticles and Nanojacketing: Physical and Electronic Properties

Contact Info

Product

Resources

About