Ligand exchange effects in gold nanoparticle assembly induced by oxidative stress biomarkers: Homocysteine and cysteine

Stobiecka, Magdalena; Deeb, Jeffrey; Hepel, Maria

doi:10.1016/j.bpc.2009.11.001

Cited by 98 publications

(68 citation statements)

References 87 publications

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“…3 F E , which is further equivalent to (kR) 3 . Considering a wavelength of~500 nm, for GNPs with R equals to 10, 25, and 40 nm, the value of (kR) 3 is 0.002, 0.031, and 0.127, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Considering a wavelength of~500 nm, for GNPs with R equals to 10, 25, and 40 nm, the value of (kR) 3 is 0.002, 0.031, and 0.127, respectively. This result demonstrates a consistent trend with the ratio of scattering to absorbance in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The surface modification of photonic nanostructures such as gold (Au) nanoparticles can lead to novel physical phenomena including selective light-matter interactions and rapid energy transfer processes [1][2][3]. The surface modification of Au nanoparticles could be achieved by using ligand coatings, inorganic material shells, or covalent/physical adsorption of nanoparticles or quantum dots of another material [4].…”

Section: Introductionmentioning

confidence: 99%

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Gold nanoparticle integrated with nanostructured carbon and quantum dots: synthesis and optical properties

Chopra

2015

Gold Bull

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Multilayer graphene shell encapsulated gold nanoparticle-quantum dot hybrids were derived by combining wetchemical, thermal, and covalent chemistry approaches. Uniformly patterned gold nanoparticles on a silicon substrate were obtained via gold film deposition in an electroless method followed by a thermal dewetting process. The resulting gold nanoparticles were further surface oxidized and utilized as catalysts for the chemical vapor deposition growth of multilayer graphene shell encapsulated on the gold nanoparticles (referred as "multilayer graphene shell encapsulated Au nanoparticle" or graphene nanoparticles (GNPs)). As a next step, the surface of GNPs was modified to result in carboxylic (−COOH) functionalities, which enabled carbodiimide-based covalent linking of amine-terminated CdS x Se 1-x @ZnS quantum dots (QDs) on the GNP surface. The GNPs and GNP-QD heterostructures were characterized using scanning and transmission electron microscopy for size, morphology, spatial distribution, and crystal structure evaluation. In addition, UV-vis, fluorescence spectroscopy, and discrete dipole approximation (DDA) modeling were utilized for understanding the band gap energies, fluorescence quenching, and light-matter interactions of the derived hybrids/heterostructures.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Gold nanoparticle integrated with nanostructured carbon and quantum dots: synthesis and optical properties

Chopra

2015

Gold Bull

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“…replacing short-chain citrate molecules in the nanoparticle shell with longer-chain GSH molecules) and interparticle interactions leading to AuNP assembly. In contrast to the behavior of NT, Hcys and GSH, replace nonthiolated AuNP shell and in the proper pH range induce assembly of gold nanoparticles ( Figure 5) (Lim et al, 2007, Lim et al, 2008, Stobiecka et al, 2010a, Stobiecka et al, 2010b. Large increase of the RELS signal was reported for both GSH and Hcys confirming the assembly process (Stobiecka et al, 2010a, Stobiecka et al, 2010b.…”

Section: Biomolecule-induced Gold Nanoparticle Assembly Studied By Relsmentioning

confidence: 87%

“…In contrast to the behavior of NT, Hcys and GSH, replace nonthiolated AuNP shell and in the proper pH range induce assembly of gold nanoparticles ( Figure 5) (Lim et al, 2007, Lim et al, 2008, Stobiecka et al, 2010a, Stobiecka et al, 2010b. Large increase of the RELS signal was reported for both GSH and Hcys confirming the assembly process (Stobiecka et al, 2010a, Stobiecka et al, 2010b. While in the Hcys-induced assembly, the main forces are Hbonding, in the case of GSH-induced assembly, the zwitterionic forces are dominant, although the H-bonding plays also a role (Lim et al, 2007, Lim et al, 2008.…”

Section: Biomolecule-induced Gold Nanoparticle Assembly Studied By Relsmentioning

confidence: 98%

Detection of Oxidative Stress Biomarkers Using Novel Nanostructured Biosensors

Hepel¹,

Stobiecka²

2011

New Perspectives in Biosensors Technology and Applications

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A Highly Sensitive Gold‐Nanoparticle‐Based Assay for Acetylcholinesterase in Cerebrospinal Fluid of Transgenic Mice with Alzheimer's Disease

Liu

Chen

Tian

et al. 2011

Adv Healthcare Materials

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Ligand exchange effects in gold nanoparticle assembly induced by oxidative stress biomarkers: Homocysteine and cysteine

Cited by 98 publications

References 87 publications

Gold nanoparticle integrated with nanostructured carbon and quantum dots: synthesis and optical properties

Gold nanoparticle integrated with nanostructured carbon and quantum dots: synthesis and optical properties

Detection of Oxidative Stress Biomarkers Using Novel Nanostructured Biosensors

A Highly Sensitive Gold‐Nanoparticle‐Based Assay for Acetylcholinesterase in Cerebrospinal Fluid of Transgenic Mice with Alzheimer's Disease

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