Giant magnetoresistance in non-magnetic phosphoric acid doped polyaniline silicon nanocomposites with higher magnetic field sensing sensitivity

被引：37

作者：

Gu, Hongbo ^{[1
,2
]}

Guo, Jiang ^{[1
]}

Wei, Huige ^{[1
,3
]}

Huang, Yudong ^{[2
]}

Zhao, Cunyu ^{[4
]}

Li, Ying ^{[4
]}

Wu, Qingliu ^{[5
]}

Haldolaarachchige, Neel ^{[6
]}

Young, David P. ^{[6
]}

Wei, Suying ^{[3
]}

Guo, Zhanhu ^{[1
]}

机构：

[1] Lamar Univ, Dan F Smith Dept Chem Engn, ICL, Beaumont, TX 77710 USA

[2] Harbin Inst Technol, Sch Chem Engn & Technol, Harbin 150001, Heilongjiang, Peoples R China

[3] Lamar Univ, Dept Chem & Biochem, Beaumont, TX 77710 USA

[4] Univ Wisconsin, Dept Mech Engn, Milwaukee, WI 53211 USA

[5] Argonne Natl Lab, Chem Sci & Engn Div, Argonne, IL 60439 USA

[6] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2013年 / 15卷 / 26期

基金：

美国国家科学基金会;

关键词：

ELECTRICAL-PROPERTIES; CONJUGATED POLYMERS; CONDUCTING POLYANILINE; OXIDE NANOCOMPOSITES; OPTICAL-PROPERTIES; TRANSPORT; METACOMPOSITES; NANOPARTICLES; POLYPYRROLE; COMPOSITE;

D O I：

10.1039/c3cp50698c

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Phosphoric acid doped conductive polyaniline (PANI) polymer nanocomposites (PNCs) reinforced with silicon nanopowders have been successfully synthesized using a facile surface initiated polymerization (SIP) method. The chemical structures of the nanocomposites are characterized using Fourier transform infrared (FT-IR) spectroscopy. The enhanced thermal stability of the silicon-PANI PNCs compared with pure PANI is obtained using thermogravimetric analysis (TGA). The obtained optical band gap of the PNCs using Ultraviolet-visible diffuse reflectance spectroscopy (UV-vis DRS) decreases with increasing silicon loading. The dielectric properties of the PNCs are strongly related to the silicon loading level. Temperature dependent resistivity analysis reveals a quasi 3-D variable range hopping (VRH) electrical conduction mechanism for the synthesized PNCs. Room temperature giant magnetoresistance (GMR) is observed in the synthesized non-magnetic nanocomposites and analyzed using the wave-function shrinkage model.

引用

页码：10866 / 10875

页数：10

共 81 条

[1] Low temperature synthesis of high molecular weight polyaniline [J].

Adams, PN ;

Laughlin, PJ ;

Monkman, AP ;

Kenwright, AM .

POLYMER, 1996, 37 (15) :3411-3417

[2]

[Anonymous], 2004, ANGEW CHEM, DOI DOI 10.1002/ange.200460616

[3] Electrospun nanofibers of blends of conjugated polymers: Morphology, optical properties, and field-effect transistors [J].

Babel, A ;

Li, D ;

Xia, YN ;

Jenekhe, SA .

MACROMOLECULES, 2005, 38 (11) :4705-4711

[4] Surfactant-free synthesis of mesoporous and hollow silica nanoparticles with an inorganic template [J].

Bau, Luca ;

Bartova, Barbora ;

Arduini, Maria ;

Mancin, Fabrizio .

CHEMICAL COMMUNICATIONS, 2009, (48) :7584-7586

[5] Synthesis and characterization of polyaniline derivatives and related carbon nanotubes nanocomposites - Study of optical properties and band gap calculation [J].

Bavastrello, Valter ;

Terencio, Tercio Bezerra Correia ;

Nicolini, Claudio .

POLYMER, 2011, 52 (01) :46-54

[6] Fabrication and property prediction of conductive and strain sensing TPU/CNT nanocomposite fibres [J].

Bilotti, Emiliano ;

Zhang, Rui ;

Deng, Hua ;

Baxendale, Mark ;

Peijs, Ton .

JOURNAL OF MATERIALS CHEMISTRY, 2010, 20 (42) :9449-9455

[7] Fabrication of polypyrrole/graphene oxide nanocomposites by liquid/liquid interfacial polymerization and evaluation of their optical, electrical and electrochemical properties [J].

Bora, C. ;

Dolui, S. K. .

POLYMER, 2012, 53 (04) :923-932

[8] Low-band-gap conjugated polymers based on thiophene, benzothiadiazole, and benzobis(thiadiazole) [J].

Bundgaard, E ;

Krebs, FC .

MACROMOLECULES, 2006, 39 (08) :2823-2831

[9] Direct observation of dipolar chains in iron ferrofluids by cryogenic electron microscopy [J].

Butter, K ;

Bomans, PHH ;

Frederik, PM ;

Vroege, GJ ;

Philipse, AP .

NATURE MATERIALS, 2003, 2 (02) :88-91

[10] The relationship between the electronic and redox properties of dispersed metal oxides and their turnover rates in oxidative dehydrogenation reactions [J].

Chen, KD ;

Bell, AT ;

Iglesia, E .

JOURNAL OF CATALYSIS, 2002, 209 (01) :35-42

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