Gold nano-islands on FTO as plasmonic nanostructures for biosensors

Cantale, Vera; Simeone, Felice C.; Gambari, Roberto; Rampi, Maria Anita

doi:10.1016/j.snb.2010.12.008

Cited by 26 publications

(27 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Other adhering layers, such as the highly transparent and conductive ITO (indium tin oxide) [ 24 ] and FTO (fluorine-doped tin oxide) [ 30 ] have also been suggested. Ghorbanpour and Falamaki [ 31 ] have replaced the Cr and Ti intermediate layers with silver, followed by an annealing treatment.…”

Section: Solid-state Dewetting Of Thin Metal Films: Principle and mentioning

confidence: 99%

Gold Nano-Island Platforms for Localized Surface Plasmon Resonance Sensing: A Short Review

et al. 2020

View full text Add to dashboard Cite

Nano-islands are entities (droplets or other shapes) that are formed by spontaneous dewetting (agglomeration, in the early literature) of thin and very thin metallic (especially gold) films on a substrate, done by post-deposition heating or by using other sources of energy. In addition to thermally generated nano-islands, more recently, nanoparticle films have also been dewetted, in order to form nano-islands. The localized surface plasmon resonance (LSPR) band of gold nano-islands was found to be sensitive to changes in the surrounding environment, making it a suitable platform for sensing and biosensing applications. In this review, we revisit the development of the concept of nano-island(s), the thermodynamics of dewetting of thin metal films, and the effect of the substrate on the morphology and optical properties of nano-islands. A special emphasis is made on nanoparticle films and their applications to biosensing, with ample examples from the authors’ work.

show abstract

Section: Solid-state Dewetting Of Thin Metal Films: Principle and mentioning

confidence: 99%

Gold Nano-Island Platforms for Localized Surface Plasmon Resonance Sensing: A Short Review

et al. 2020

View full text Add to dashboard Cite

show abstract

“…LSPR spectroscopy was used to monitor the process of probe immobilization. According to the Mie theory, binding of an organic molecule to a nanochip can induce an increase in the local refractive index, and result in a red-shift of the LSPR wavelength peak [3]. Thus, the wavelength shift (Δλmax) could act as a reliable indicator of molecular binding onto the surface of nanoparticles.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, noble metal nanoparticles have attracted much research attention for their potential application in biosensors, due to the remarkable optical properties of localized surface plasmon resonance (LSPR) [1][2][3][4]. Generally, LSPR arises in noble metal nanoparticles, especially Au and Ag, when the incident photon frequency resonates with collective oscillations of free electrons [5].…”

mentioning

confidence: 99%

Detection of p53 gene mutation by using a novel biosensor based on localized surface plasmon resonance

Duan

Yuan²,

Yang³

et al. 2012

neo

View full text Add to dashboard Cite

Few studies to date have reported on the development and application of a nanobiosensor based on localized surface plasmon resonance (LSPR) for detecting gene mutations. This study aimed to develop a novel LSPR biosensor used for detecting p53 mutation. Nanosphere lithography was used to fabricate the silver nanoparticles. The DNA probe was designed to recognize the target sequence and immobilized on the chip surface by a covalent-coupling method using amine-group ligands. Synthetic oligonucleotides or PCR products were amplified from genomic DNA taken from blood samples and hybridized with the immobilized probe. Wild-type and mutant p53 was detected by measuring shifts in peak of LSPR extinction spectra. The low detection limit of the sensor for target sequence was 10 nM, and detection occurred over a wide dynamic range (10 nM - 10 μM). Importantly, the differences in measuring signal between wild-type and mismatched p53 DNA was significant, allowing for this sensor to effectively discriminate against single base mutations. In conclusion, we developed a biosensor with potential as a rapid, label-free, sensitive, and low-cost method for detecting p53 mutation. Our results suggest that such an LSPR-based biosensor provides an attractive alternative for clinical detection of genetic mutation.

show abstract

“…Au nanostructures (Au NSs) have been widely used for applications in electronics, electrochemistry, plasmonics, biomedical sensing, etc. [1,2,3,4,5]. In particular, Au NSs have been considered promising catalysts for the methanol oxidation reaction (MOR) because Au NSs do not form poisoning intermediates during electrocatalytic reactions [6,7,8,9].…”

Section: Introductionmentioning

confidence: 99%

Low-Temperature Vapor-Phase Synthesis of Single-Crystalline Gold Nanostructures: Toward Exceptional Electrocatalytic Activity for Methanol Oxidation Reaction

et al. 2019

View full text Add to dashboard Cite

Au nanostructures (Au NSs) have been considered promising materials for applications in fuel cell catalysis, electrochemistry, and plasmonics. For the fabrication of high-performance Au NS-based electronic or electrochemical devices, Au NSs should have clean surfaces and be directly supported on a substrate without any mediating molecules. Herein, we report the vapor-phase synthesis of Au NSs on a fluorine-doped tin oxide (FTO) substrate at 120 °C and their application to the electrocatalytic methanol oxidation reaction (MOR). By employing AuCl as a precursor, the synthesis temperature for Au NSs was reduced to under 200 °C, enabling the direct synthesis of Au NSs on an FTO substrate in the vapor phase. Considering that previously reported vapor-phase synthesis of Au NSs requires a high temperature over 1000 °C, this proposed synthetic method is remarkably simple and practical. Moreover, we could selectively synthesize Au nanoparticles (NPs) and nanoplates by adjusting the location of the substrate, and the size of the Au NPs was controllable by changing the reaction temperature. The synthesized Au NSs are a single-crystalline material with clean surfaces that achieved a high methanol oxidation current density of 14.65 mA/cm2 when intimately supported by an FTO substrate. We anticipate that this novel synthetic method can widen the applicability of vapor-phase synthesized Au NSs for electronic and electrochemical devices.

show abstract

Gold nano-islands on FTO as plasmonic nanostructures for biosensors

Cited by 26 publications

References 65 publications

Gold Nano-Island Platforms for Localized Surface Plasmon Resonance Sensing: A Short Review

Gold Nano-Island Platforms for Localized Surface Plasmon Resonance Sensing: A Short Review

Detection of p53 gene mutation by using a novel biosensor based on localized surface plasmon resonance

Low-Temperature Vapor-Phase Synthesis of Single-Crystalline Gold Nanostructures: Toward Exceptional Electrocatalytic Activity for Methanol Oxidation Reaction

Contact Info

Product

Resources

About

Gold nano-islands on FTO as plasmonic nanostructures for biosensors

Cited by 26 publications

References 65 publications

Gold Nano-Island Platforms for Localized Surface Plasmon Resonance Sensing: A Short Review

Gold Nano-Island Platforms for Localized Surface Plasmon Resonance Sensing: A Short Review

Detection of p53 gene mutation by using a novel biosensor based on localized surface plasmon resonance

Low-Temperature Vapor-Phase Synthesis of Single-Crystalline Gold Nanostructures: Toward Exceptional Electrocatalytic Activity for Methanol Oxidation Reaction

Contact Info

Product

Resources

About

Detection of p53 gene mutation by using a novel biosensor based on localized surface plasmon resonance