A high local DNA concentration for nucleating a DNA/Fe coordination shell on gold nanoparticles

2020 ◽  
Vol 56 (30) ◽  
pp. 4208-4211 ◽  
Author(s):  
Zhicheng Huang ◽  
Biwu Liu ◽  
Juewen Liu
Keyword(s):  
Gold Nanoparticles ◽  
Coordination Shell ◽  
Dna Concentration ◽  
Dna Nanoparticles ◽  
Fe Nanoparticles ◽  
Dna Density

A high localized DNA density on AuNP can facilitate the formation of DNA/Fe hybrids. The TEM images of AuNP@DNA/Fe nanoparticles (above) and aggregated AuNP@DNA nanoparticles (below).

scholarly journals Control over Surface DNA Density on Gold Nanoparticles Allows Selective and Sensitive Detection of Mercury(II)

Langmuir ◽  
2008 ◽  
Vol 24 (15) ◽  
pp. 8346-8350 ◽  
Author(s):  
Chi-Wei Liu ◽  
Chih-Ching Huang ◽  
Huan-Tsung Chang
Keyword(s):  
Gold Nanoparticles ◽  
Sensitive Detection ◽  
Dna Density

DNA-Templated Gold Nanoparticles Formation

2008 ◽  
Vol 8 (9) ◽  
pp. 4415-4423 ◽  
Author(s):  
Lanlan Sun ◽  
Yonghai Song ◽  
Li Wang ◽  
Yujing Sun ◽  
Cunlan Guo ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Reaction Time ◽  
Absorption Spectra ◽  
Reaction Temperature ◽  
Intermediate Product ◽  
Gold Nanostructures ◽  
Hybrid Nanoparticles ◽  
Reaction Conditions ◽  
Xps Spectra ◽  
Dna Concentration

The interaction between HAuCl4 and DNA has enabled creation of DNA-templated gold nanoparticles without formation of large nanoparticles. It was found that spheral DNA-HAuCl4 hybrid of 8.7nm in diameter, flower-like DNA-HAuCl4 hybrid, nanoparticles chains and nanoparticles network of DNA-HAuCl4 hybrid could be obtained by varying the reaction conditions, including DNA concentration and reaction temperature. The intermediate product was investigated by shortening the reaction time of DNA and HAuCl4, and the obtained nanoparticles preserved a small DNA segment, which indicated that the reaction between DNA and HAuCl4 had a process. The addition of reduction reagent resulted in DNA-templated gold nanoparticles and nanoflowers, respectively. UV-vis absorption spectra were used to characterize the DNA-HAuCl4 hybrid and the gold nanostructures templated on DNA, and XPS spectra were used to compare the composition of DNA-Au(III) complex and gold nanoparticles. AFM and TEM results revealed that the spheral gold nanoparticles of about 11 nm in size and flower-like gold nanoparticles were formed after the addition of NaBH4.

Surface Passivation Improves the Synthesis of Highly Stable and Specific DNA-Functionalized Gold Nanoparticles with Variable DNA Density

2015 ◽  
Vol 7 (12) ◽  
pp. 7033-7040 ◽  
Author(s):  
Jashmini Deka ◽  
Rostislav Měch ◽  
Luca Ianeselli ◽  
Heinz Amenitsch ◽  
Fernando Cacho-Nerin ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Surface Passivation ◽  
Functionalized Gold Nanoparticles ◽  
Dna Density

scholarly journals X-ray Absorption Spectroscopy Unveils the Formation of Gold Nanoparticles in Corn

2009 ◽  
Vol 19 ◽  
pp. 76-81 ◽  
Author(s):  
Guadalupe De la Rosa ◽  
Jessica Torres ◽  
Jasón G. Parsons ◽  
José Ramón Peralta-Videa ◽  
Hiram Castillo-Michel ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Absorption Spectroscopy ◽  
Fold Increase ◽  
Coordination Shell ◽  
Gold Concentration ◽  
Uptake Capacity ◽  
Edge Structure ◽  
X Ray ◽  
Corn Seed ◽  
X Ray Absorption

In this study, X-ray absorption spectroscopy was used to determine the possible gold biotransformation by Zea mays (corn) var. Golden, germinated and grown in a medium spikedwith KAuCl4. In addition, the gold uptake capacity of corn assisted by thiourea and ammoniumthiocyanate was investigated. Results showed that up to 160 mg/L, gold did no treduce corn seed germination or plant growth. Both thiourea and ammonium thiocyanateresulted in a 6-fold increase of gold concentration in roots and thiourea promoted a 10-fold increase of gold concentration in shoots. X-ray absorption near edge structure studies demonstrated that approximately 91% of the gold present in plant samples was Au(0). Theremaining 9% was present as Au(III). In addition, extended X-ray absorption fi ne structureresults showed that in corn roots, the gold coordination number was around 9,5 neighboringgold atoms at approximately 2,86 Å, indicating an incomplete fi rst coordination shell,which imply the presence of a nano-phase. The results demonstrated that Z. mays was ableto produce gold nanoparticles with a size of 10,36 nm.

EpCam-specific Gold Nanoparticles for Detection, Live-imaging and Rapid Enrichment of Adult Human Liver Progenitor Cells

2013 ◽  
Vol 51 (01) ◽  
Author(s):  
N Fekete-Drimusz ◽  
J de la Roche ◽  
F Vondran ◽  
CL Sajti ◽  
MP Manns ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Progenitor Cells ◽  
Human Liver ◽  
Live Imaging ◽  
Adult Human

Design and analysis of doxorubicin derivativatized gold nanoparticles for tumor-targeted drug delivery

Planta Medica ◽  
2014 ◽  
Vol 80 (10) ◽  
Author(s):  
L Xia ◽  
DGI Kingston
Keyword(s):  
Drug Delivery ◽  
Gold Nanoparticles ◽  
Targeted Drug Delivery ◽  
Targeted Drug

Enhanced radiation efficiency by gold nanoparticles after proton beam irradiation in medulloblastoma cell lines

2016 ◽  
Vol 228 (06/07) ◽  
Author(s):  
A Rashidi ◽  
S Barcikovski ◽  
S Jendrzej ◽  
S Tippelt ◽  
G Fleischhack ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Proton Beam ◽  
Cell Lines ◽  
Radiation Efficiency ◽  
Beam Irradiation ◽  
Proton Beam Irradiation ◽  
Medulloblastoma Cell ◽  
Medulloblastoma Cell Lines
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