Enhanced ultraviolet emission from highly dispersed ZnO quantum dots embedded in poly(vinyl pyrrolidone) electrospun nanofibers

Zhang, Zhenyi; Shao, Changlu; Gao, Fei; Li, Xinghua; Liu, Yichun

doi:10.1016/j.jcis.2010.03.052

Cited by 45 publications

(25 citation statements)

References 40 publications

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“…The main absorption band of ZnO is located near 500 cm -1 (inset of Figure 3) which is assigned to stretching vibrations of ZnO, as reported in the literature [13,14]. The spectrum of resulting PVP/ZnO fiber presents a shift in the carbonyl group peak of PVP from 1656 cm -1 to 1647 cm -1 as previously reported by Zhang et al [6] which characterize the interaction between zinc oxide particles and carbonyl group of PVP. The shift in the peak represents a strong indication that molecular interaction established between PVP molecules and ZnO nanoparticles contributes with minimal aggregation of semiconductor particles.…”

Section: Ftir Spectrasupporting

confidence: 79%

“…Characteristic peaks of C=C, C-N and C=O stretching vibrations can be seen in the spectrum of pure PVP at 1440 cm -1 , 1291 cm -1 and 1656 cm -1 , respectively [6]. The main absorption band of ZnO is located near 500 cm -1 (inset of Figure 3) which is assigned to stretching vibrations of ZnO, as reported in the literature [13,14].…”

Section: Ftir Spectrasupporting

confidence: 77%

“…The use of electrospinning technique for massive production of bionanocomposites has been progressively reported in the literature [5][6][7][8][9][10] as a promising procedure for synthesis of low cost material with unique properties (porosity and homogeneity of nanoparticles along the synthesized fibers) applied in tissue engineering, controlled drug release and bone replacement. The incorporation of antimicrobial nanoparticles into nanofibers contributes with improvement in the biological application of new materials if considered the typical high surface area of electrospun fibers and minimal aggregation level.…”

Section: Introductionmentioning

confidence: 99%

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Bactericidal activity of zinc oxide particles embedded in poly(vinyl pyrrolidone) electrospun fibers

2014

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Composites of metal oxide nanoparticles incorporated into poly(vinyl pyrrolidone) electrospun fibers can be considered potential and low cost bactericidal agents. Homogeneous distribution of nanoparticles in the core of fibers and minimal aggregation induced by strong interaction with polymeric template are factors that contribute with diffusion of metal oxide nanoparticles from bulk to the fiber surface and subsequent release of nanoparticles to bacterial culture. Hybrid electrospun fibers were successfully applied against bacteria as a result of reasonable degree of interaction between zinc oxide and fibers as detected from FTIR analysis, DSC curves and SEM images.

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Section: Ftir Spectrasupporting

confidence: 79%

Section: Ftir Spectrasupporting

confidence: 77%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Bactericidal activity of zinc oxide particles embedded in poly(vinyl pyrrolidone) electrospun fibers

2014

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“…[1][2][3][4][5][6][7][8][9][10][11][12]. Furthermore, ZnO is an environmental friendly, easily available and low cost material which makes it more useful and easy to be investigated upon.…”

Section: Introductionmentioning

confidence: 99%

Red shift of the band-edge photoluminescence emission and effects of annealing and capping agent on structural and optical properties of ZnO nanoparticles

Verma

Kole

Kumbhakar

2015

Journal of Alloys and Compounds

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“…Figure 2a shows the FT-IR spectra of the dried silica-gel films prior to calcination. The absorption peaks at 2,952, 1,645, 1,423, and 1,289 cm -1 observed in the spectra correspond to the C-H stretching, C=O stretching, C-H bending, and C-N bending vibrations of PVP, respectively [21]. The broad O-H stretching peak (3,415 cm -1 ) is due to the O-H moieties in the water, ethanol, and silanol groups.…”

Section: Resultsmentioning

confidence: 89%

Preparation and characterization of gold nanoparticle-loaded silica-gel films for localized surface plasmon resonance sensing

Yanagida

Nakagawa

Kishi

et al. 2015

J Sol-Gel Sci Technol

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Gold nanoparticles (AuNPs) were investigated as a sensing material because their absorption wavelength due to localized surface plasmon resonance (LSPR) shifts depending on the surrounding environment. For accurate sensing, the immobilization of dispersed AuNPs on a substrate is desirable. However, attaching AuNPs to smooth surfaces is difficult because the adhesion forces between AuNPs and most substrates are very weak. In this study, thick and porous silicagel films were prepared via a dip-coating method using polyvinylpyrrolidone-containing silica sols. The AuNPs were precipitated in the silica-gel films by immersion in HAuCl 4 solution followed by heating. The effects of the silica-gel film calcination temperature and the silica-sol aging conditions on sample structures, LSPR peak wavelengths, and LSPR sensing abilities against the change in refractive index were investigated. When the calcination temperature decreased, the intensity of LSPR absorption increased significantly because the silica gel calcined at low temperatures had a sparse structure and a significant quantity of AuNPs in the silica gel pores. The aging conditions of the silica sol also affected the structures of the AuNP-loaded silica gel films and their LSPR sensing abilities. The sample prepared from a silica sol aged at 25°C contained much larger AuNPs and exhibited a higher sensing ability than the sample prepared from a silica sol aged at 40°C. The high sensing ability of the sample prepared from the silica sol aged at 25°C was considered to result from both the large size of the AuNPs and the low silica gel density around them.

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Enhanced ultraviolet emission from highly dispersed ZnO quantum dots embedded in poly(vinyl pyrrolidone) electrospun nanofibers

Cited by 45 publications

References 40 publications

Bactericidal activity of zinc oxide particles embedded in poly(vinyl pyrrolidone) electrospun fibers

Bactericidal activity of zinc oxide particles embedded in poly(vinyl pyrrolidone) electrospun fibers

Red shift of the band-edge photoluminescence emission and effects of annealing and capping agent on structural and optical properties of ZnO nanoparticles

Preparation and characterization of gold nanoparticle-loaded silica-gel films for localized surface plasmon resonance sensing

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