Layer-by-layer ionic self-assembly of Au colloids into multilayer thin-films with bulk metal conductivity

Liu, Yanjing; Wang, You-Xiong; Claus, Richard O.

doi:10.1016/s0009-2614(98)01209-3

Cited by 146 publications

(90 citation statements)

References 16 publications

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“…Liu et al [23] have reported that ionic self-assembled GNP-PE thin films exhibit the same order of magnitude conductivity as bulk gold (Au) metals. Due to the moderate resistivity of typical LbL CNT-PE thin films ( [18]), a CNT-PE inductor coil antenna will be limited by its high series resistance.…”

Section: Conductive Carbon Nanotube-gold Nanocomposite For Rfid Inducmentioning

confidence: 99%

Passive wireless strain and pH sensing using carbon nanotube-gold nanocomposite thin films

Loh¹,

Lynch

Kotov

2007

SPIE Proceedings

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The recent development of wireless sensors for structural health monitoring has revealed their strong dependency on portable, limited battery supplies. Unlike current wireless sensors, passive radio frequency identification (RFID) systems based on inductive coupling can wirelessly receive power from a portable reader while transmitting collected data back. In this paper, preliminary results of a novel inductively coupled strain and corrosion sensor based upon material fabrication techniques from the nanotechnology field are presented. By varying polyelectrolyte species during a layer-by-layer fabrication process, carbon nanotube-polyelectrolyte multilayer thin film sensors sensitive to different mechanical (e.g. strain) and chemical (e.g. pH) stimuli can be produced. Validation studies conducted with different carbon nanotube thin films designed as either strain or pH sensors reveal high sensitivity and linear performance. When coupled with a copper inductive coil antenna, resulting RFID-based sensors exhibit wirelessly readable changes in resonant frequency and bandwidth. Furthermore, a carbon nanotube-gold nanocomposite thin film is fabricated and patterned into a highly conductive coil structure to realize a novel thin film inductive antenna. Preliminary results indicate that nanotube-gold nanocomposites exhibit resonance conditions, holding great promise for future RFID applications.

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Section: Conductive Carbon Nanotube-gold Nanocomposite For Rfid Inducmentioning

confidence: 99%

Passive wireless strain and pH sensing using carbon nanotube-gold nanocomposite thin films

Loh¹,

Lynch

Kotov

2007

SPIE Proceedings

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“…The LbL assembly takes advantage of the same attractive forces that form complexes but in a controlled manner that produces thin, conformal films that can coat a variety of surfaces and thus are a powerful method for fabricating multilayer gold nanoparticle films. [15][16][17][18][19][20][21][22][23][24][25][26][27] In spite of these many reports, to the best of our knowledge, well-controlled gold nanoparticle assemblies guided with a polypeptide network have not yet been reported. The aim of this article is to construct homogeneously well-ordered gold nanoparticle multilayers assisted with a b-sheet peptide template.…”

Section: Introductionmentioning

confidence: 99%

Layer-by-layer fabrication of well-packed gold nanoparticle assemblies guided by a β-sheet peptide network

Higashi

Takagi

Koga

2010

Polym J

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In this study, we describe the first demonstration of well-ordered multilayer thin films of gold nanoparticles through a layer-bylayer (LbL) technique assisted by a polypeptide template. Anionic poly(L-glutamic acid) (PLGA)-modified gold nanoparticles were prepared as building units for LbL self-assembly. Two types of synthetic polymers, poly(L-lysine) (PLL) and poly(allylamine), were used as polycations that carry the same amino groups at the side chain, although the former is a polypeptide and the latter is a vinyl polymer. The deposition process and the resultant multilayer films were characterized by means of absorption, circular dichroism, Fourier transform infrared and atomic force microscopy measurements. Experimental results revealed that LbL multilayer properties, such as thickness, conformation of the peptide component, homogeneity and periodicity of nanoparticle layers, were significantly affected by the kind of polycations present. In particular, the combination of anionic PLGA-coated gold nanoparticles and cationic PLL induced b-sheet formation, which enabled the fabrication of a homogeneously well-packed gold nanoparticle multilayer without aggregation.

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“…The layer-by-layer (LbL)technique is used to build up a sufficient thickness of such material on the fibre and is based on the electrostatic attraction between oppositely charged molecules to create the layers and thereby increase the overall coating thickness [1]. The principal advantage of the use of this technique is the ability to create stable deposited thin films with well-organized structure and controlled nanometer thicknesses on substrates of various shapes and sizes [2][3][4][5][6][7]. Generally, the thin films created by using the LbL technique are stable [2,8], and it is difficult to remove them from a solid substrate.…”

Section: Introductionmentioning

confidence: 99%

Optical sensor for pH monitoring using a layer-by-layer deposition technique emphasizing enhanced stability and re-usability

Raoufi

Surre

Rajarajan

et al. 2014

Sensors and Actuators B: Chemical

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Layer-by-layer ionic self-assembly of Au colloids into multilayer thin-films with bulk metal conductivity

Cited by 146 publications

References 16 publications

Passive wireless strain and pH sensing using carbon nanotube-gold nanocomposite thin films

Passive wireless strain and pH sensing using carbon nanotube-gold nanocomposite thin films

Layer-by-layer fabrication of well-packed gold nanoparticle assemblies guided by a β-sheet peptide network

Optical sensor for pH monitoring using a layer-by-layer deposition technique emphasizing enhanced stability and re-usability

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