Size-controlled synthesis of monodispersed gold nanoparticles via carbon monoxide gas reduction

Young, Joseph K.; Lewinski, Nastassja A.; Langsner, Robert J.; Kennedy, Laura C.; Satyanarayan, Arthi; Nammalvar, Vengadesan; Lin, Adam Yuh; Drezek, Rebekah A.

doi:10.1186/1556-276x-6-428

Cited by 62 publications

(47 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 9e shows the binding energy peaks at 83.8 and 87.4 eV specific for Au 4f 7/2 and Au 4f 5/2 , respectively. The characteristic features of these peaks indicate the presence of AuNPs in the metallic state on the modified PS plate surface (Young et al 2011). Also, it indicates that the physical adsorption of AuNPs on the aminated PS plate surface through the electrostatic interactions and the hydrogen bonds (Carré and Lacarrière 2007).…”

Section: Xps Characterization Of Amine Modified and Aunps Stained Ps mentioning

confidence: 99%

See 1 more Smart Citation

Gold nanoparticles assisted characterization of amine functionalized polystyrene multiwell plate and glass slide surfaces

et al. 2014

View full text Add to dashboard Cite

We demonstrated citrate-capped gold nanoparticles assisted characterization of amine functionalized polystyrene plate and glass slide surfaces through AuNPs staining method. The effect of AuNPs concentration on the characterization of amine modified surfaces was also studied with different concentration of AuNPs (ratios 1.0-0.0). 3-Aminopropylyl triethoxy silane has been used as amine group source for the surface modification. The interactions of AuNPs on modified and unmodified surfaces were investigated using atomic force microscopy and the dispersibility, and the aggregation of AuNPs was analyzed using UV-visible spectrophotometer. Water contact angle measurement and X-ray photoelectron spectroscopy (XPS) were used to further confirmation of amine modified surfaces. The aggregation of AuNPs in modified multiwell plate leads to the color change from red to purple and they are found to be adsorped on the modified surfaces. Aggregation and adsorption of AuNPs on the modified surfaces through the electrostatic interactions and the hydrogen bonds were revealed by XPS analysis. Remarkable results were found even in the very low concentration of AuNPs (ratio 0.2). This AuNPs staining method is simple, cost-effective, less time consuming, and required very low concentration of AuNPs. These results can be read out through the naked eye without the help of sophisticated equipments.

show abstract

Section: Xps Characterization Of Amine Modified and Aunps Stained Ps mentioning

confidence: 99%

“…11b-e, respectively). These spectral data show that the AuNPs present in the metallic state even after the adsorption on the modified surface (Flores-Perez and Ivanisevic 2007; Durdureanu- Angheluta et al 2012;Young et al 2011). …”

Section: Xps Characterization Of Amine Modified and Aunps Stained Ps mentioning

confidence: 99%

Gold nanoparticles assisted characterization of amine functionalized polystyrene multiwell plate and glass slide surfaces

et al. 2014

View full text Add to dashboard Cite

show abstract

“…These excellent properties of AuNPs depend upon size and shape that are controlled by various reducing and stabilizing agents [10]. Sodium citrate [11], sodium borohydride [12], surfactants [13], various amines [14,15], and peptides [16,17] are used as common and stabilizing agents for the synthesis of AuNPs.…”

Section: Introductionmentioning

confidence: 99%

Gold nanoparticle induces mitochondria-mediated apoptosis and cell cycle arrest in nonsmall cell lung cancer cells

et al. 2017

View full text Add to dashboard Cite

The present study reports the chemical synthesis of gold nanoparticles (AuNPs) using sodium borohydride as a reducing and capping agent. The various temperatures and time intervals were investigated for controlled formation of AuNPs. The characterization of AuNPs was studied using UV-vis spectrophotometer, transmission electron microscope (TEM), selected area diffraction (SAED), energy-dispersive X-ray spectrophotometer (Edx), dynamic light scattering (DLS), zeta potential, and X-ray powder diffraction (XRD), and results indicated that AuNPs were spheroid in shape and cubic lattice and face centered in nature with 29 nm in size. AuNPs have potential antimicrobial activity against selected human clinical pathogens. IC 50 concentration of AuNPs was determined as 20 μg/ml against non-small cell lung cancer (NSCLC) cell lines using MTT assay. The morphological and apoptosis effects of AuNPs on NSCLC were investigated using acridine orange/ethidium bromide (AO/EB), 2′,7′-dichlorofluorescein-diacetate (DCFH-DA), rhodamine 123, and 4′,6-diamidino-2-phenylindole (DAPI) staining method, and results indicated that AuNPs have potential anticancer activity against NSCLC cell lines. The anticancer activity of AuNPs is that it has less toxicity against human HBL100 normal cells. These anticancer potentials of AuNPs were compared with the standard drug cisplatin. Moreover, after 24 h exposure, AuNPs arrest the cell cycle at G2/M phase in A549 cells. These findings suggested that AuNPs could act as a potential anticancer agent against lung cancer.

show abstract

“…The first growth mechanism is the formation of particles from coalescence of the nuclei only. The second growth mechanism is the coalescence of nuclei into simple and multiple twins with further growth from monomer attachment of Au atoms on the surface . The NZVI–AC composites were obtained in a form that yielded NZVI particles attached to AC.…”

Section: Resultsmentioning

confidence: 99%

Efficient nitrate removal using micro‐electrolysis with zero valent iron/activated carbon nanocomposite

Guo

Zhou

Zhang

et al. 2016

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

BACKGROUND Increasing nitrate concentration in ground water resources due to increased municipal and industrial contaminations is posing a great threat to human health worldwide. Therefore, an efficient technique to remove nitrate from ground water is in high demand. RESULT In this study, nanoscale zero valent iron (NZVI)/activated carbon (AC) nanocomposite material was successfully synthesized to form a highly efficient micro‐galvanic cell to be used in the chemical reduction of nitrate. Analysis of NZVI‐AC composites were conducted by BET, XRD, SEM, TEM and XPS, while utilizing sodium borohydride as a reducing agent in liquid phase reaction for the reduction of ferrous ions. Several factors during the preparation process were investigated for their effect on the performance of the material when used for the reduction of nitrate in aqueous media. Experiment results demonstrated that the material prepared under optimized preparation conditions can remove up to 94.3% of nitrates with composites at 2.1 g L−1. The final degradation products are mainly N2 and NH4+. CONCLUSION The composites were found to behave more efficiently for nitrate removal when compared with NZVI. In addition, the production of these new composite materials can be economically scaled up as with NZVI, which is necessary for practical environmental remediation. © 2016 Society of Chemical Industry

show abstract

Size-controlled synthesis of monodispersed gold nanoparticles via carbon monoxide gas reduction

Cited by 62 publications

References 31 publications

Gold nanoparticles assisted characterization of amine functionalized polystyrene multiwell plate and glass slide surfaces

Gold nanoparticles assisted characterization of amine functionalized polystyrene multiwell plate and glass slide surfaces

Gold nanoparticle induces mitochondria-mediated apoptosis and cell cycle arrest in nonsmall cell lung cancer cells

Efficient nitrate removal using micro‐electrolysis with zero valent iron/activated carbon nanocomposite

Contact Info

Product

Resources

About