Engineered Polymer for Controlled Metal Nanoparticle Synthesis

Fu, Baosong; Missaghi, Michael N.; Downing, Christopher M.; Kung, Mayfair C.; Kung, Harold H.; Xiao, Guomin

doi:10.1021/cm100159j

Cited by 42 publications

(25 citation statements)

References 20 publications

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“…Nevertheless, the ultra-small size nanoparticles (NPs) usually are unstable and easily aggregate into larger particles due to their high surface energy, which will result in the decrease of the specific surface area. To avoid the aggregation, the most commonly used method is to stabilize the NPs by some capping agents, for example surfactants, polymers or ligands [17][18][19]. However, the employment of capping agent, which could effectively restrain NPs from aggregating, may severely limit the chemical activities of the NPs, hindering their practical use.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Mn3O4 nanoparticles/nitrogen-doped graphene hybrid composite for nonenzymatic glucose sensor

Yang

Wang

et al. 2015

Sensors and Actuators B: Chemical

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Section: Introductionmentioning

confidence: 99%

Synthesis of Mn3O4 nanoparticles/nitrogen-doped graphene hybrid composite for nonenzymatic glucose sensor

Yang

Wang

et al. 2015

Sensors and Actuators B: Chemical

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“…It is well recognized that the size, shape, and surface properties of AgNPs are closely related to their properties; however, smaller AgNPs are easy to aggregate due to their high surface energy, so synthesis of AgNPs with small size and uniform dispersion has been devoted great efforts in recent years. During the application of AgNPs, they are often fastened to organic polymer or inorganic support to avoid aggregation [13–16]. Guo et al have done much work on the synthesis of small and size‐controlled AgNPs using tannin‐grafted collagen fiber [6].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of silver nanoparticles in electrospun polyacrylonitrile nanofibers using tea polyphenols as the reductant

Zou

Zhu

et al. 2012

Polymer Engineering & Sci

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Uniformly dispersed Ag nanoparticles (AgNPs) with diameter about 5 nm embedded in electrospun polyacrylonitrile (PAN) nanofibers were synthesized by using tea polyphenols (TP) as the reductant. The reducing ability of TP toward Ag ions was characterized by Fourier transform infrared spectroscopy and ultraviolet–visible spectra, and the results revealed that TP exhibit satisfied reducing ability in the synthesis process. Transmission electron microscopy observation showed that the synthesized spherical AgNPs with diameter about 5 nm were immobilized on the surface and in the interior of PAN nanofibers by electrospinning technology. The interactions of Ag with PAN and TP were investigated by X‐ray photoelectron spectroscopy (XPS), and the results suggested that PAN polymer and TP both served as stabilizer during the synthesis of AgNPs because of the chelating interactions of Ag with cyano groups and phenolic hydroxyls. The synthesized AgNPs in PAN nanofibers exhibit good antibacterial property and may be used for antibacterial and catalytic applications. POLYM. ENG. SCI., 2013. © 2012 Society of Plastics Engineers

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“…Unfortunately, organic passivators such as thiophenol, thiourea and mercaptoacetate are environmentally hazardous. One of the approaches to avoid AgNPs aggregation, hence retain their antimicrobial efficacy, is to incorporate them into biodegradable polymers 16,17 . Several reports exist on the incorporation of AgNPs into mats or dressings in various forms: powders, foams, hydrogels, polymeric films and meshes; each form claims to have certain advantages, but bactericidal efficacy of silver is common among them all [18][19][20][21] .…”

mentioning

confidence: 99%

Facile preparation of a novel biogenic silver-loaded Nanofilm with intrinsic anti-bacterial and oxidant scavenging activities for wound healing

Bardania

Mahmoudi

Bagheri

et al. 2020

Sci Rep

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To eliminate the microbial infection from an injury site, various modalities have been developed such as dressings and human skin substitutes. However, the high amount of reactive oxygen species, microbial infection, and damaging extracellular matrix remain as the main challenges for the wound healing process. In this study, for the first time, green synthesized silver nanoparticles (AgNPs) using Teucrium polium extract were embedded in poly lactic acid/poly ethylene glycol (PLA/PEG) film to provide absorbable wound dressing, with antioxidant and antibacterial features. The physicochemical analysis demonstrated, production of AgNPs with size approximately 32.2 nm and confirmed the presence of phytoconstituents on their surface. The antibacterial assessments exhibited a concentration-dependent sensitivity of Staphylococcus aureus and Pseudomonas aeruginosa toward biosynthesized AgNPs, which showed a suitable safety profile in human macrophage cells. Furthermore, oxidant scavenging assays demonstrated exploitation of plant extract as a reducing agent, endows antioxidant activity to biogenic AgNPs. The formation of PLA/PEG nanofilm and entrapment of AgNPs into their matrix were clearly confirmed by scanning electron microscopy. More importantly, antibacterial examination demonstrated that the introduction of biogenic AgNPs into PLA/PEG nanofibers led to complete growth inhibition of P. aeruginosa and S. aureus. In summary, the simultaneous antioxidant activity and antimicrobial activity of the novel biogenic AgNPs/PLA/PEG nanofilm showed its potential for application as wound dressing.activities of porous Ag nanofilm were investigated. We anticipate that the Ag nanofilm wound dressing with free radical scavenging capacity would enhance the wound healing process. Moreover, this study proposed a low-cost and facile method for preparation of Ag nanofilm as a potential wound dressing. Materials and MethodsMaterials. Methanol (CH 3 OH, 99.9%), silver nitrate (AgNO 3 ), nutrient agar, ferric chloride hexahydrate (FeCl 3 , 6H 2 O), iron (II) sulfate tetrahydrate (FeSO 4 .4H 2 O), dichloromethane, polyethylene glycol 300, ascorbic acid and Mueller-Hinton agar (MHA) were purchased from Merck (Germany). 2,2-diphenyl-1-picrylhydrazyl (DPPH), 3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium bromide (MTT) and 2,4,6-Tripyridyl-s-Triazine (TPTZ) were purchased from Sigma (Germany) and poly lactic acid (PLA) from Zhejiang Hisun Biomaterials (China). The RAW264 macrophage cell line was purchased from National Cell Bank, Pasteur Institute of Iran, Iran and Dulbecco's Modified Eagle's Medium (DMEM), Fetal Bovine Serum (FBS), 1% Penicillin-Streptomycin from Gibco (Paisley, UK). All aqueous solutions were prepared using double distilled water. All reagents used were of analytical grade. Clinical strains of Pseudomonas aeruginosa 38 and Staphylococcus aureus 39 bacteria were isolated from hospitalized patients by our group, which have been characterized as antibiotic-resistant strains.Extract preparation. T.polium is a wild-growing...

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Engineered Polymer for Controlled Metal Nanoparticle Synthesis

Abstract: A designer polymethylhydrosiloxane molecule, modified with nitrile and silanol groups, offers independent control of metal loading and particle size distribution when used to assist the preparation of metal nanoparticles.

Cited by 42 publications

References 20 publications

Synthesis of Mn3O4 nanoparticles/nitrogen-doped graphene hybrid composite for nonenzymatic glucose sensor

Synthesis of Mn3O4 nanoparticles/nitrogen-doped graphene hybrid composite for nonenzymatic glucose sensor

Synthesis of silver nanoparticles in electrospun polyacrylonitrile nanofibers using tea polyphenols as the reductant

Facile preparation of a novel biogenic silver-loaded Nanofilm with intrinsic anti-bacterial and oxidant scavenging activities for wound healing

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