Tunable gold-chitosan nanocomposites by local field engineering

Cazacu, Ana; Curecheriu, Lavinia; Neagu, Alexandra; Padurariu, Leontin; Cernescu, Adrian; Lisiecki, Isabelle; Mitoseriu, Liliana
June 2013
Applied Physics Letters;6/3/2013, Vol. 102 Issue 22, p222903
Academic Journal
A method to control the permittivity and tunability in composite materials formed by conductive nanoparticles embedded in a flexible nonlinear dielectric matrix is proposed. The local field distributions in composite structures were determined and the field-induced permittivity was estimated for different volume fraction of conductive particles. The predicted tunability behavior agrees well with the observed trends obtained for gold nanoparticles embedded in chitosan matrix. The paper demonstrates the concept of engineered local fields in nanocomposites by using metallic nanoparticles as fillers in polymer matrix for tailoring the permittivity and tunability values.


Related Articles

  • Uniform Distribution and Stabilization of Nanoparticles in a Bacterial Poly-β-hydroxybutyrate Gel. Puzyr, A. P.; Bukaemskii, A. A.; Belobrov, P. I.; Volova, T. G. // Doklady Biochemistry & Biophysics;Jan/Feb2001, Vol. 376 Issue 1-6, p23 

    Presents a study which analyzed experimental data demonstrating the possibility to develop a nanocomposite material based on a microbiological polymer and immobilized nanoparticles of aluminum oxide or diamond. Facts in which the idea of the development of a nanocomposite material was based;...

  • Modeling of soft interfacial volume fraction in composite materials with complex convex particles. Wenxiang Xu; Wen Chen; Huisu Chen // Journal of Chemical Physics;1/21/2014, Vol. 140 Issue 3, p1 

    The influence of the soft interfacial volume fraction on physical properties of composite materials has been found to be significant. However, the soft interfacial volume fraction is difficultly determined by traditional experimental methods and simple models proposed so far. This article...

  • Study of anomalous coercivity in MnZn-ferrite/SiO2 composite. Zhang, X. Y.; Chen, Y. J.; Zhang, Y. L. // Journal of Materials Science Letters;Dec2003, Vol. 22 Issue 23, p1689 

    The article reports that in recent years, many researchers have studied composites, which exhibit not only the properties of the individual component but also some astonishing properties in the composite. Many valuable experimental phenomena can be observed in different systems dispersed in...

  • CoAl2O4–Fe2O3 p-n nanocomposite electrodes for photoelectrochemical cells. Kwang-Soon Ahn; Yanfa Yan; Moon-Sung Kang; Jin-Young Kim; Shet, Sudhakar; Heli Wang; Turner, John; Al-Jassim, Mowafak // Applied Physics Letters;7/13/2009, Vol. 95 Issue 2, p022116 

    CoAl2O4–Fe2O3 p-n nanocomposite electrodes were deposited on Ag-coated stainless-steel substrates and annealed at 800 °C. Their photoelectrochemical (PEC) properties were investigated and compared with that of p-type CoAl2O4 films. We found that the nanocomposite electrodes exhibit...

  • Self-Defocusing of Laser Radiation in a Composite Material Containing ZnSe:O Nanoparticles. Vinogradova, O. P.; Marukhina, M. S.; Sidorov, A. I. // Technical Physics Letters;Jun2005, Vol. 31 Issue 6, p528 

    We present experimental data on the self-defocusing of nanosecond pulses of 0.53-, 1.06-, and 1.54-μm laser radiation in a thick composite material containing nanoparticles of oxygen-doped zinc selenide. This medium can provide for a linear transmission coefficient of 50–60% at a...

  • Influence of the diameter of CaCO3 particles on the mechanical and rheological properties of PVC composites. Zeng, X. F.; Wang, W. Y.; Wang, G. Q.; Chen, J. F. // Journal of Materials Science;May2008, Vol. 43 Issue 10, p3505 

    PVC composites filled with CaCO3 particles with different diameter (about 40, 80, 500, 25000 nm) were prepared by using a single-screw extruder. The mechanical and rheological properties of the composites were investigated. The results showed that while the diameter of CaCO3 nanoparticles was...

  • Formation and enhanced biocidal activity of water-dispersable organic nanoparticles. Zhang, Haifei; Wang, Dong; Butler, Rachel; Campbell, Neil L.; Long, James; Tan, Bien; Duncalf, David J.; Foster, Alison J.; Hopkinson, Andrew; Taylor, David; Angus, Doris; Cooper, Andrew I.; Rannard, Steven P. // Nature Nanotechnology;Aug2008, Vol. 3 Issue 8, p506 

    Water-insoluble organic compounds are often used in aqueous environments in various pharmaceutical and consumer products. To overcome insolubility, the particles are dispersed in a medium during product formation, but large particles that are formed may affect product performance and safety....

  • A Simple Effective Flaw Model on Analyzing the Nanofiller Agglomeration Effect of Nanocomposite Materials. Krishnan, Arun; Xu, L. Roy // Journal of Nanomaterials;2012, p1 

    A special mechanics/material phenomenon involving nanocomposites is the agglomeration of nanofillers at high volume fractions of nanofillers. Numerous experimental investigations on nanocomposites have indicated a significant decrease in mechanical properties, due to the agglomeration of...

  • The effect of precursor types on the magnetic properties of Y-type hexa-ferrite composite. Chin Mo Kim; Eunhye Na; Ingyu Kim; Sung Yong An; Jung-wook Seo; Kangheon Hur; Hakkwan Kim // Journal of Applied Physics;2015, Vol. 117 Issue 17, p17A507-1 

    With magnetic composite including uniform magnetic particles, we expect to realize good high-frequency soft magnetic properties. We produced needle-like (α-FeOOH) nanoparticles with nearly uniform diameter and length of 20 and 500 nm. Zn-doped Y-type hexa-ferrite samples were prepared by...


Read the Article


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

Try another library?
Sign out of this library

Other Topics