CTAB-Assisted Synthesis of Size- and Shape-Controlled Gold Nanoparticles in SDS Aqueous Solution

Moon, Seong‐Yong; Kusunose, Takafumi; Sekino, Tohru

doi:10.1016/j.matlet.2009.06.047

Cited by 72 publications

(48 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Gold as a precious metal with superior catalytic behavior has been used more as a catalyst since the synthesis of ultra-fine gold particles via coprecipitation for oxidation of carbon monoxide by Haruta et al 7 Control of size and shape of gold deposits have been an interesting case of study for researchers. [8][9][10][11][12] Knowledge on the mechanism and kinetics of electrocrystallization of gold on glassy carbon (GC) and graphite has given insights into electrodeposition of nanoparticles with controlled shape and size. 13,14 Electrodeposition of gold has been carried out in various conditions (medium, pH, gold solution concentration and technique).…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Deposition of Gold Nanoparticles on Pencil Graphite by Fast Scan Cyclic Voltammetry

Etesami

Karoonian

Mohamed

2011

J Chinese Chemical Soc

View full text Add to dashboard Cite

Gold nanoparticles (AuNPs) were electrodeposited on the surface of pencil graphite (PG) by fast scan cyclic voltammetry without using any additives in acidic medium. The effect of deposition time on the size of electrodeposited AuNPs was investigated in sulfuric acid as a supporting electrolyte. The deposition time was varied by varying the scan rate, number of cycles and applied potential range. Scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD) were used for characterization of PG and electrodeposited AuNPs. The results confirmed that nanosized gold particles (20 ± 8 nm) were deposited on the PG substrate with almost spherical geometry.

show abstract

Section: Introductionmentioning

confidence: 99%

Electrochemical Deposition of Gold Nanoparticles on Pencil Graphite by Fast Scan Cyclic Voltammetry

Etesami

Karoonian

Mohamed

2011

J Chinese Chemical Soc

View full text Add to dashboard Cite

show abstract

“…The positively charged group of cationic surfactants usually contains a quaternary ammonium, although analogues containing sulphur, phosphorus or arsenic exist as well [35]. Due to the versatility of quaternary ammonium surfactants ''quats'' to retain their positive charge at any pH, they have been used for the synthesis and control of nanomaterials [36,37]. CTAB has been shown to interact with single-and double-stranded DNA to form cubic and hexagonal nanostructures, respectively [38].…”

Section: Cationic Surfactant-mediated Detection Of Pfldhmentioning

confidence: 99%

Aromatic Surfactant as Aggregating Agent for Aptamer-Gold Nanoparticle-Based Detection of Plasmodium Lactate Dehydrogenase

et al. 2016

View full text Add to dashboard Cite

A novel ssDNA aptamer (P38), with a 40 mer random region flanked by primer-binding sites on both sides, targeting Plasmodium falciparum lactate dehydrogenase (PfLDH) has been developed through systematic evolution of ligands by exponential enrichment (SELEX), including counter SELEX against human lactate dehydrogenase A and B (hLDH A and B). The 2D structure of P38 shows the presence of three stem loops with a δG of -9.18 kcal/mol. EMSA studies on P38 complexes with the increasing concentration of PfLDH revealed a dissociation constant of 0.35 µM. P38 has been exploited for the quantitative detection of PfLDH using cationic surfactant-mediated aggregation of gold nanoparticles (16-nm diameter) as an optical probe. Among the three different cationic surfactants, characterized by different hydrocarbon tail groups, benzalkonium chloride (BCK) was found to be most efficient with a limit of detection of 281 ± 11 pM. This BCK-based approach with the novel highly selective aptamer provides simple and sensitive detection of PfLDH in the clinically relevant range.

show abstract

“…However, NPs do not often follow colloid filtration theory (Liu et al, 2009). In colloid filtration theory, particles are assumed spherical at <2 μm, and NPs show wide variety in their shapes including triangles, icosahedrons, and ellipses (Moon et al, 2009) and cylindrical CNTs (Li et al, 2008b). Recently Lin and Wiesner (2012) showed that primary NPs size is the driving force rather than the aggregate size in determining the efficacy of their interaction with matrix surfaces in environment.…”

Section: B Aggregationmentioning

confidence: 99%

Biocatalytic Synthesis Pathways, Transformation, and Toxicity of Nanoparticles in the Environment

Dwivedi

Lena

2014

Critical Reviews in Environmental Science and Technology

View full text Add to dashboard Cite

Wide application of nanoparticles (NPs) in consumer products over the last decade has increased their flux in the environment. This paper provides comprehensive review on the biocatalytic production pathways, transformations, and toxicity to human and other organisms of important NPs. Plants, algae, fungi, and bacteria have been used for energy-efficient and nontoxic biocatalytic production of NPs. The process is simple, serving as an alternative to the more popular physicochemical methods. NPs go through significant physicochemical transformation in the environment. Ionic strength, pH, and NPs' surface potential strongly influence their stability and aggregation. Their transformations are linked to their bioavailability and aging including surface coatings and dissolved organic carbon effects. In addition, nanotoxicity has been a major global concern as NPs are toxic to organisms due to their cytotoxicity and genotoxicity. The stability and transformation of NPs in environment influence their short-and long-term toxicity. Release of free metal ions, dissolution-enhanced toxicity, and direct intercalation with biological targets are studied the most. Their toxicity to ecological receptors and organisms are linked to oxidative stress by generation of reactive oxygen species. Moreover, NPs toxicity depends on their physicochemical alterations. Inherent and acquired properties have potential to alter toxicity of NPs. Thus achieving safe nanotechnology and minimizing their adverse impact is important to protect the health of humans as well as the environment.

show abstract

CTAB-Assisted Synthesis of Size- and Shape-Controlled Gold Nanoparticles in SDS Aqueous Solution

Cited by 72 publications

References 10 publications

Electrochemical Deposition of Gold Nanoparticles on Pencil Graphite by Fast Scan Cyclic Voltammetry

Electrochemical Deposition of Gold Nanoparticles on Pencil Graphite by Fast Scan Cyclic Voltammetry

Aromatic Surfactant as Aggregating Agent for Aptamer-Gold Nanoparticle-Based Detection of Plasmodium Lactate Dehydrogenase

Biocatalytic Synthesis Pathways, Transformation, and Toxicity of Nanoparticles in the Environment

Contact Info

Product

Resources

About