Controlled Molecularly Mediated Assembly of Gold Nanooctahedra for a Glucose Biosensor

Huang, Xing-Jiu; Li, Cuncheng; Gu, Bonsang; Kim, Ju-Hyun; Cho, Sung-Oh; Choi, Yang‐Kyu

doi:10.1021/jp710112q

Cited by 20 publications

(13 citation statements)

References 34 publications

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“…They could also detect the multi-plex surface markers of breast cancer cells by using the antibody-conjugated gold nanorod molecular probes ( 373 ). Huang et al recently reported a molecularly mediated assembling strategy to fabricate a layered superstructure of gold nano-octahedra ( 374 ). They used this assembled structure as the host matrix for a glucose sensor.…”

Section: Applications Of Anisotropic Nanomaterialsmentioning

confidence: 99%

Anisotropic nanomaterials: structure, growth, assembly, and functions

et al. 2011

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Comprehensive knowledge over the shape of nanomaterials is a critical factor in designing devices with desired functions. Due to this reason, systematic efforts have been made to synthesize materials of diverse shape in the nanoscale regime. Anisotropic nanomaterials are a class of materials in which their properties are direction-dependent and more than one structural parameter is needed to describe them. Their unique and fine-tuned physical and chemical properties make them ideal candidates for devising new applications. In addition, the assembly of ordered one-dimensional (1D), two-dimensional (2D), and three-dimensional (3D) arrays of anisotropic nanoparticles brings novel properties into the resulting system, which would be entirely different from the properties of individual nanoparticles. This review presents an overview of current research in the area of anisotropic nanomaterials in general and noble metal nanoparticles in particular. We begin with an introduction to the advancements in this area followed by general aspects of the growth of anisotropic nanoparticles. Then we describe several important synthetic protocols for making anisotropic nanomaterials, followed by a summary of their assemblies, and conclude with major applications.

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Section: Applications Of Anisotropic Nanomaterialsmentioning

confidence: 99%

Anisotropic nanomaterials: structure, growth, assembly, and functions

et al. 2011

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“…These results demonstrate that agarose film has little effect on the biochemical activity of GOx after immobilization onto an Au surface. It is worthwhile to note that the noncovalent link of ferrocene to the SWCNT was demonstrated in a previous report [13]. Therefore, this study does not include FTIR spectroscopy of the ferrocene/SWCNT hybrids.…”

Section: Resultsmentioning

confidence: 96%

“…Another improved electrical method of contact for flavoenzymes was reported that used the surface-reconstitution of enzymes on a pyrroloquinoline quinine-flavin adenine dinucleotide (FAD) monolayer [10,11] or on an FAD cofactor unit linked to a redox polymer thin film [12]. In addition, with the help of FeðCNÞ 3À 6 , the nanooctahedra act as a good nanoconnectors that electrically come into contact with the active center of the enzyme and the electrode, resulting in high electron-transfer activity and high biocatalytic efficiency [13].…”

Section: Introductionmentioning

confidence: 99%

Alternative route to reconstitute an electrical contact of enzyme on a single-walled carbon nanotube–ferrocene hybrid

Liu

Huang

et al. 2008

Journal of Electroanalytical Chemistry

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“…25 The decoration of metallic NPs on multiwalled carbon nanotubes (MWCNTs) has been shown to enhance the conductivity of electrochemical sensors. Hrapovic et al 26 used both nafion-coated single-walled carbon nanotubes (SWCNTs) and Pt(NPs) for the detection of low concentration of hydrogen peroxide (H 2 O 2 ), which was better compared to SWCNTs or Pt(NPs) alone. Au-functionalized MWCNTs have also been employed as a sensing platform in electrochemical sensing of hydroxylamine, paraoxon, laccase from trametes versicolor extracts, and glycan assay on living cancer cells.…”

Section: Introductionmentioning

confidence: 99%

Role of Au(NPs) in the enhanced response of Au(NPs)-decorated MWCNT electrochemical biosensor

Mehmood

Ciancio

Carlino

et al. 2018

IJN

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BackgroundThe combination of Au-metallic-NPs and CNTs are a new class of hybrid nanomaterials for the development of electrochemical biosensor. Concentration of Au(nanoparticles [NPs]) in the electrochemical biosensor is crucial for the efficient charge transfer between the Au-NPs-MWCNTs modified electrode and electrolytic solution.MethodsIn this work, the charge transfer kinetics in the glassy carbon electrode (GCE) modified with Au(NPs)–multiwalled carbon nanotube (MWCNT) nanohybrid with varied concentrations of Au(NPs) in the range 40–100 nM was studied using electrochemical impedance spectroscopy (EIS). Field emission scanning electron microscopy and transmission electron microscopy confirmed the attachment of Au(NPs) on the surface of MWCNTs.ResultsThe cyclic voltammetry and EIS results showed that the charge transfer mechanism was diffusion controlled and the rate of charge transfer was dependent on the concentration of Au(NPs) in the nanohybrid. The formation of spherical diffusion zone, which was dependent on the concentration of Au(NPs) in nanohybrids, was attributed to result in 3 times the increase in the charge transfer rate ks, 5 times increase in mass transfer, and 5% (9%) increase in Ipa (Ipc) observed in cyclic voltammetry in 80 nM Au(NP) nanohybrid-modified GCE from MWCNT-modified GCE. The work was extended to probe the effect of charge transfer rates at various concentrations of Au(NPs) in the nanohybrid-modified electrodes in the presence of Escherichia coli. The cyclic voltammetry results clearly showed the best results for 80 nM Au(NPs) in nanohybrid electrode.ConclusionThe present study suggested that the formation of spherical diffusion zone in nanohybrid-modified electrodes is critical for the enhanced electrochemical biosensing applications.

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Controlled Molecularly Mediated Assembly of Gold Nanooctahedra for a Glucose Biosensor

Cited by 20 publications

References 34 publications

Anisotropic nanomaterials: structure, growth, assembly, and functions

Anisotropic nanomaterials: structure, growth, assembly, and functions

Alternative route to reconstitute an electrical contact of enzyme on a single-walled carbon nanotube–ferrocene hybrid

Role of Au(NPs) in the enhanced response of Au(NPs)-decorated MWCNT electrochemical biosensor

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