Molecularly Bridged Gold Nanoparticle Array for Sensing Applications

Shiigi, Hiroshi; Nagaoka, Tsutomu

doi:10.2116/analsci.30.89

Cited by 17 publications

(14 citation statements)

References 92 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, the tadpole microstructure possesses good shape stability in contrast to that found in previous work. 16,17,25 In summary, we successfully prepared tadpole-shaped microstructures in a single step by controlling the concentration of aniline, which acts as a reducer and passivation layer after the formation of aggregates.…”

Section: Tracking the Growth Of Tadpole-shaped Aggregates By Scanningmentioning

confidence: 99%

See 1 more Smart Citation

Tracking the Growth of Tadpole-shaped Aggregates by Scanning Electron Microscopy

et al. 2014

Self Cite

View full text Add to dashboard Cite

A single-step strategy has been developed toward the synthesis of micrometer-sized, tadpole-like structures comprising a repeating sequence of a three-dimensional gold nanoparticle (AuNP)-aniline polymer-AuNP arrangement. The size and shape of the microstructure strongly depends on the concentration of aniline in the reaction solution. Herein, we describe the formation mechanism of the microstructure by focusing on the surface morphology.

show abstract

Section: Tracking the Growth Of Tadpole-shaped Aggregates By Scanningmentioning

confidence: 99%

“…The UV-vis spectrum of the raspberry-like hybrid had significant peaks at 450 and 560 nm, which could be attributed to the generation of a localized polaron (cation radical) of polyaniline (PANI) [21][22][23][24][25] and the surface plasmon resonance (SPR) of the AuNP, respectively (Fig. 2a).…”

Section: Tracking the Growth Of Tadpole-shaped Aggregates By Scanningmentioning

confidence: 99%

Tracking the Growth of Tadpole-shaped Aggregates by Scanning Electron Microscopy

et al. 2014

Self Cite

View full text Add to dashboard Cite

show abstract

“…1,2,[3][4][5][6][7] Another advantage of these nanoparticles is the feasibility to design sensor systems through coating the AuNPs with a receptor that can selectively bind to a specific analyte. For example, a target nucleotide can be detected by AuNPs modified with a complementary nucleotide, which undergoes a red-to-purple color change upon hybridization.…”

Section: Introductionmentioning

confidence: 99%

Multi-coloration of Calixarene-coated Silver Nanoparticles for the Visual Discrimination of Metal Elements

Abe

Iki

2017

ANAL. SCI.

View full text Add to dashboard Cite

Upon mixing with metal ions such as Cd II , Tb III , Cu II , Ni II , Pb II , Zn II , and Co II at pH 10.0, solutions of silver nanoparticles (AgNPs) coated with calix[4]arene-p-tetrasulfonate (CAS-AgNP) exhibited multi-coloration from yellow to orange, violet, and green, depending on the metal elements present, which allowed for visual discrimination of the ions. This is contrary to the AgNP sensors exhibiting a uniform color change from yellow to red upon binding of a receptor molecules at the surface of AgNPs to an analyte. The TEM images of the samples obtained from the resultant solution showed two regions. First, a region where CAS-AgNPs assembled on the surface of the metal hydroxides. The size of the hydroxide crystals varied from 50 to 200 nm with the type of metal element present, and roughly correlated with the extinction band of the aggregated AgNPs. Second, the amorphous region in which CAS-AgNPs dispersed randomly. The difference in the amount of the crystal region and the area seemed to lead to the multi-coloration.

show abstract

“…[8][9][10][11] Gold nanoparticles (AuNP) have also been widely of concern recently because of their unique optical and electronic properties. [12][13][14][15] The defects and oxygen-containing groups on the surfaces of reduced graphene oxide (RGO), due to incomplete reduction from GO, make it a perfect carrier to combine AuNPs. 16 Since the Au-RGO nanocomposite has unique properties for increasing the sensing area and enhancing the electron-transfer rate, increasing efforts have been devoted to incorporate AuNPs into the RGO matrix to improve both the sensitivity and selectivity of biosensors.…”

Section: Introductionmentioning

confidence: 99%

An Electrochemical DNA Biosensor Based on Au-reduced Graphene Oxide Nanocomposite for Transgenic Event Bt63 Detection

Tang

Wang

et al. 2017

ANAL. SCI.

View full text Add to dashboard Cite

A simple and reliable electrochemical biosensor based on an in situ synthetic Au-reduced graphene oxide (Au-RGO) nanocomposite was constructed in this work, which is considered to be a potential sensing platform for sensitive and selective Bt63 rice detection. UV-vis spectroscopy, transmission electron microscopy (TEM), and cyclic voltammograms of the surface characterization indicated that RGO was prepared successfully and Au nanoparticles were well dispersed on its surface with an average size of 20 nm. The square-wave voltammetry (SWV) response of the electrochemical marker methylene blue (MB) was chosen to monitor the probe immobilization and target hybridization event. Under the optimum conditions, the peak values of MB were linear with the logarithm of the target DNA concentrations being from 1.0 × 10 -9 to 1.0 × 10 -14 M; the detection limit was 3.36 × 10 -15 M. Studies also demonstrated that the DNA biosensor had high reproducibility and stability. At last, we used this biosensor to detect several rice samples; it showed good sensitivity and selectivity. Thus the applicability of the method as an effective tool for genetically modified organism (GMO) quantification was confirmed by its accurate and sensitive results in Bt63 rice screening.

show abstract

Molecularly Bridged Gold Nanoparticle Array for Sensing Applications

Cited by 17 publications

References 92 publications

Tracking the Growth of Tadpole-shaped Aggregates by Scanning Electron Microscopy

Tracking the Growth of Tadpole-shaped Aggregates by Scanning Electron Microscopy

Multi-coloration of Calixarene-coated Silver Nanoparticles for the Visual Discrimination of Metal Elements

An Electrochemical DNA Biosensor Based on Au-reduced Graphene Oxide Nanocomposite for Transgenic Event Bt63 Detection

Contact Info

Product

Resources

About