Preparation and electrochemical properties of gold nanoparticles containing carbon nanotubes-polyelectrolyte multilayer thin films

Abstract

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Size-tailored synthesis of gold nanoparticles and their facile deposition on AAO-templated carbon nanotubes via electrostatic self-assembly: Application to H2O2 detection

“…Among the AuNPs/CNTs with different Au core sizes, the Au-(P1:D4-10.6 nm)/CNTs shows the best electroactivity for H 2 O 2 reduction. This is because of the formation of high density and the uniformity of AuNPs and their low surface covering by bulky and non-conductive PVP molecules (10,20,30,40,50,60,70,80,90, 100 mV/s from top to down). The inset is a relationship between the cathodic peak current and the square root of the scan rate.…”

“…Up until the present, the wrapping of CNTs with ionic polymer followed by the assembling with oppositely charged AuNPs has been extensively exploited [29,[31][32][33][34][35][37][38][39][40]. However, it should be noted that the covering of CNTs with polymer layers may hinder the electron transfer between the component species.…”

“…Among various nanocomposites, gold nanoparticles decorated carbon nanotubes (AuNPs/CNTs) have attracted a great deal of interest in diversified areas such as optical, chemical and biological sensing, electronic and catalytic applications [1][2][3][4][5][6][7][8][9][10] due to their combined outstanding properties and versatile syntheses. Based on the binding mode between AuNPs and CNTs, there have been three main approaches for the decoration of AuNPs on the surface of CNTs [11][12][13], including direct [14][15][16][17][18][19][20][21][22][23], covalent [24][25][26][27][28] and non-covalent [29][30][31][32][33][34][35][36][37][38][39][40][41][42][43] depositions. Nevertheless, some important drawbacks of the direct and the covalent attachments involving the ineffective size control of the former and the multistep reactions of the latter are still left to be addressed.…”

Highly sensitive amperometric sensing of nitrite utilizing bulk-modified MnO 2 decorated Graphene oxide nanocomposite screen-printed electrodes

“…The surface modification of electrode has been adopted popularly to obtain a higher current response and to lower overpotential. In this context, the composites based on engineered carbon nano-materials are now days being principally used for designing electrochemical sensors/biosensors due to excellent electrochemical properties [15][16][17][18][19].…”

Nanocomposite Coating of Multilayered Carbon Nanotube–Titania

“…Thin films can be synthesized by various processes, including sol-gel methods [22], chemical vapor deposition, sputter coating [33], spin coating, and spray pyrolysis [23][24][25][26][27]. Layer-by-layer (LBL) self-assembly technique is a versatile route in the film preparation, which is capable of depositing a diversity of materials on various substrates with controlled thickness [28,29,30,35]. The basic principle of LBL technique is the electrostatic interaction between the materials with opposite surface charge.…”