Copper-based nanostructures: promising antibacterial agents and photocatalysts

Gao, Feng; Pang, Huan; Xu, S.-P.; Lu, Qingyi

doi:10.1039/b904801d

Cited by 100 publications

(63 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…As an important p-type semiconductor metal oxide with a narrow band gap (1.2-1.5 eV), copper oxide (CuO) has drawn increasing research attention due to its attractive properties like nontoxicity, excellent reactivity, chemical stability, electrochemical activity, low production cost and abundant availability, and has been widely used in diverse applications like gas sensors, solar cells, field emissions, Li-batteries, supercapacitors, and catalysis [4][5][6][7][8][9]. Unfortunately, the reports on the photodegradation of organic dyes using CuO as photocatalyst is limited as the activity of pure CuO is not high enough due to the fast recombination of photogenerated electron-hole pairs [10][11][12][13][14][15][16]. An effective approach to overcome this barrier is to couple CuO with another semiconductor material since coupling two semiconductors with different energy levels results in mutual transfer of photogenerated electrons and holes from one semiconductor to the other, resulting in an efficient charge separation, an increased lifetime Page 6 of 30 A c c e p t e d M a n u s c r i p t 5 of the charge carriers, and an enhanced interfacial charge transfer to adsorbed substrates.…”

Section: Introductionmentioning

confidence: 98%

Novel CuCr2O4 embedded CuO nanocomposites for efficient photodegradation of organic dyes

Mageshwari

Ramakrishnan²,

Lee

et al. 2015

Applied Surface Science

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 98%

Novel CuCr2O4 embedded CuO nanocomposites for efficient photodegradation of organic dyes

Mageshwari

Ramakrishnan²,

Lee

et al. 2015

Applied Surface Science

View full text Add to dashboard Cite

“…Zero-valent copper, copper oxide, ionic copper and copper-containing molecular complexes have all shown some degree of antibacterial property. Recent work suggests that nanoscale forms of copper [4][5][6][7][8] (and other antimicrobial metals; silver [ 9 ] and zinc, [ 10 ] for example) are particularly effective at inhibiting bacterial growth. Though the general mechanism of action for nanoscale metal-based antimicrobial agents is largely unknown, enhanced metal-ion release, [ 11 , 12 ] specifi c action at the organism-nanomaterial interface (e.g., reactive oxide species [ 11 , 13 ] and cell membrane damage [ 12 , 14 , 15 ] ), and combinations thereof have been proposed.…”

Section: Introductionmentioning

confidence: 99%

Copper‐Based Nanostructured Coatings on Natural Cellulose: Nanocomposites Exhibiting Rapid and Efficient Inhibition of a Multi‐Drug Resistant Wound Pathogen, A. baumannii, and Mammalian Cell Biocompatibility In Vitro

Cady¹,

Behnke²,

Strickland³

2011

Adv Funct Materials

201

124

View full text Add to dashboard Cite

This paper describes a layer‐by‐layer (LBL) electrostatic self‐assembly process for fabricating highly efficient antimicrobial nanocoatings on a natural cellulose substrate. The composite materials comprise a chemically modified cotton substrate and a layer of sub‐5 nm copper‐based nanoparticles. The LBL process involves a chemical preconditioning step to impart high negative surface charge on the cotton substrate for chelation controlled binding of cupric ions (Cu2+), followed by chemical reduction to yield nanostructured coatings on cotton fibers. These model wound dressings exhibit rapid and efficient killing of a multidrug resistant bacterial wound pathogen, A. baumannii, where an 8‐log reduction in bacterial growth can be achieved in as little as 10 min of contact. Comparative silver‐based nanocoated wound dressings–a more conventional antimicrobial composite material–exhibit much lower antimicrobial efficiencies; a 5‐log reduction in A. baumannii growth is possible after 24 h exposure times to silver nanoparticle‐coated cotton substrates. The copper nanoparticle–cotton composites described herein also resist leaching of copper species in the presence of buffer, and exhibit an order of magnitude higher killing efficiency using 20 times less total metal when compared to tests using soluble Cu2+. Together these data suggest that copper‐based nanoparticle‐coated cotton materials have facile antimicrobial properties in the presence of A. baumannii through a process that may be associated with contact killing, and not simply due to enhanced release of metal ion. The biocompatibility of these copper‐cotton composites toward embryonic fibroblast stem cells in vitro suggests their potential as a new paradigm in metal‐based wound care and combating pathogenic bacterial infections.

show abstract

“…In recent times owing to advancement of some resistant bacterial strains to counter the antibiotics, the antibacterial activity of nanomaterials, such as zinc, silver and copper, with their unique size dependent properties has attracted great attentions [1][2][3][4][5]. For instance, ZnO with a quartzite hexagonal phase have a direct band gap of 3.37 eV possesses a wide range of technological applications.…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of ZnO-Cu2O Composite Nanoparticles and Effect of Cu2O Doping in ZnO on Antimicrobial Activity

Bayahia¹,

M²,

Hassan³

et al. 2017

Mod Chem Appl

View full text Add to dashboard Cite

The comparative antibacterial activity of ZnO and ZnO-Cu 2 O composite nanoparticles has been investigated and presented in this manuscript. The present study describes the facile synthesis of pristine ZnO nanoparticles and ZnO-Cu 2 O composite nanoparticles respectively. ZnO nanoparticles and ZnO-Cu 2 O composite nanoparticles have been synthesized by simple solution process using zinc nitrate hexahydrate and copper acetate as sole precursor. The diameter of each ZnO and ZnO-Cu 2 O composite nanoparticles lies between 200 to 600 nm respectively as observed from SEM images. Herein, we scrutinized the influence of Cu 2 O doping in ZnO on the antibacterial activity. The E. coli bacteria which are generally ever-present have been chosen as the model organisms for relative study. The experimental procedures for the antibacterial test include spectroscopic method, taking different concentrations (10-40 μg/ml) of samples to unearth the minimum inhibitory concentration. Our analysis says that the minimum concentration of ZnO and ZnO-Cu 2 O composite nanoparticles which inhibited the growth of E. coli bacteria was found to be 10 μg. A mechanism was also proposed to describe the better antibacterial activity of the ZnO-Cu 2 O composite nanoparticles than the pure ZnO nanoparticles.

show abstract

Copper-based nanostructures: promising antibacterial agents and photocatalysts

Cited by 100 publications

References 11 publications

Novel CuCr2O4 embedded CuO nanocomposites for efficient photodegradation of organic dyes

Novel CuCr2O4 embedded CuO nanocomposites for efficient photodegradation of organic dyes

Copper‐Based Nanostructured Coatings on Natural Cellulose: Nanocomposites Exhibiting Rapid and Efficient Inhibition of a Multi‐Drug Resistant Wound Pathogen, A. baumannii, and Mammalian Cell Biocompatibility In Vitro

Facile Synthesis of ZnO-Cu2O Composite Nanoparticles and Effect of Cu2O Doping in ZnO on Antimicrobial Activity

Contact Info

Product

Resources

About