Syntheses and Optical Properties of the Water-Dispersible ZnS:Mn Nanocrystals Surface Capped by L-Aminoacid Ligands: Arginine, Cysteine, Histidine, and Methionine

Lee, Ju Ho; Kim, Yong Ah; Kim, Kimoon; Huh, Young‐Duk; Hyun, June Won; Kim, H. S.; Noh, S. J.; Hwang, Cheong‐Soo

doi:10.5012/bkcs.2007.28.7.1091

Cited by 38 publications

(2 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The broad band in the range of 3400-3000 cm -1 was due to stretching of NH (Ramachandran and Natarajan 2006). Some researchers also reported it at 3431 cm -1 (Lee et al 2007). Interaction of AuNps with oxidized L-methionine caused blue shift.…”

Section: Characterization Of the Particlesmentioning

confidence: 97%

“…Interaction of AuNps with oxidized L-methionine caused blue shift. The encapsulation of L-methionine over AuNps surface leads to variation in IR-spectral bands, and this is in relation with ZnS: Mn nanocrystals capped with amino acids where strong peaks around 2950 and 1600 cm -1 were assigned to Zn coordinated by amino group via NH 2 (Lee et al 2007). In this case, these bands were seen at 2920 and 1580 cm -1 in L-methionine capped AuNps suggesting the encapsulation of newly formulated AuNps with L-methionine via NH 2 group.…”

Section: Characterization Of the Particlesmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis and study of catalytic application of l-methionine protected gold nanoparticles

et al. 2017

View full text Add to dashboard Cite

Gold nanoparticle is growing class of nanotechnology due to large number of uses. We synthesized stable L-methionine protected gold nanoparticles (AuNps) by in situ reduction of HAuCl 4 using sodium borohydrate as reducing and L-methionine as stabilizing agent in an aqueous medium. Different parameters (pH, capping agent, precursor salt, and heating time) were optimized to see the effect on the size of particles. Double beam spectrophotometer was used to carry out the spectroscopic studies. It was observed that pH and concentration of reducing salt are deciding factors in controlling the size and morphology of AuNps. Scanning electron microscopy (SEM) verified the formation of AuNPs as predicted by UV-Vis spectra. The interaction of AuNPs with L-methionine was confirmed by Fourier Transform Infrared (FTIR). The reduction of 4-nitrophenol acted as standard of reaction to check the response of AuNps catalyst. Complete reduction of 4-nitrophenol was accomplished by AuNps sol in just 60 s. Fastest reduction rate was observed with smaller spherical particles. This study concluded that size and shape of AuNps can be monitored by controlling the pH, concentration of capping and reducing agent. It also provides an economical solution to aquatic environment in terms of time saving and use of small volume of catalytic solution for reduction of several other toxic organic pollutants.

show abstract

Section: Characterization Of the Particlesmentioning

confidence: 97%

Section: Characterization Of the Particlesmentioning

confidence: 99%

Synthesis and study of catalytic application of l-methionine protected gold nanoparticles

et al. 2017

View full text Add to dashboard Cite

show abstract

Highly luminescent and biocompatible, l‐citrulline‐capped ZnS:Mn nanocrystals for rapid screening of metal accumulating Lysinibacillus fusiformis bacteria

et al. 2013

View full text Add to dashboard Cite

Biocompatible and highly luminescent manganese doped zinc sulfide (ZnS:Mn) nanocrystals of average particle size 10 nm have been synthesized by capping with a novel amino acid ligand, L-citrulline. Though there are many reports on the bioimaging applications of nanostructured semiconductors, the present study focused on the detection of a special type of metal accumulating bacteria, Lysinibacillus fusiformis. This bacterium has significant applications in the disposal of metal components from industrial effluents. In this context, the detection of this bacterium is quite important and the present work demonstrates a novel technique for this bacterial detection. The synthesized nanocrystals were attached to Lysinibacillus fusiformis and characteristics of the bioconjugated system were studied. The blue shift observed in the ultraviolet-visible absorption and photoluminescence spectra of the bioconjugated system, confirms conjugation of the Lysinibacillus fusiformis with L-citrulline-capped ZnS:Mn. When the bioconjugated system (capped ZnS:Mn + bacteria) was observed using a fluorescent microscope under excitation wavelengths 365.4 nm (ultraviolet), 435.8 nm (blue) and 546.1 nm (green), fluorescence emissions were obtained in yellow, green and red regions respectively. The study of relative growth of Lysinibacillus fusiformis in the presence of L-citrulline-capped ZnS:Mn proves biocompatible property of these nanocrystals and their tunable color properties under different excitation wavelengths make them ideal for biolabeling applications.

show abstract

Thermo‐Optical Properties of Amino Acid Modified ZnO‐PVA Colloidal Suspension Under CW Laser Illumination

Tamgadge¹,

Pahurkar

Sunatkari³

et al. 2016

Macromolecular Symposia

View full text Add to dashboard Cite

Summary In this paper, we present synthesis of amino acids (l‐arginine and l‐alanine) assisted surface modification of ZnO nanoparticles (NPs) using chemical precipitation method. Study emphasizes the utility of l‐arginine over l‐alanine in the synthesis process and ZnO NPs with average particle size of 18 nm have been successfully obtained using l‐arginine. Structural properties were evaluated using powder X‐ray diffraction (XRD) pattern, energy dispersive X‐ray spectroscopy (EDAX) and transmission electron microscopy (TEM) that confirmed the purity, surface morphology and hexagonal wurtzite crystal structure of ZnO NPs. Linear optical studies using ultraviolet‐visible (UV‐vis) spectroscopy and Fourier transform infra‐red (FT‐IR) spectroscopy indicated the blue shift of excitons absorption wavelength and surface modification by amino acids. Blue shifting is more prominent for l‐arginine and optical band gap of 3.48 eV has been achieved in the present case. Third order nonlinearity (nonlinear refraction and absorption) of ZnO NPs embedded in polyvinyl alcohol (ZnO‐PVA colloidal suspension) was studied by Z‐scan technique at wavelength 632.8 nm in continuous wavelength regime which shows negative nonlinearity with self‐defocusing effect. Large value of n2 and β were obtained in case of ZnO NPs passivated by l‐arginine and effect was attributed to thermal lensing. Thermally stimulated third order nonlinear susceptibility (x(3)) for ZnO‐PVA colloids have also been calculated and presented.

show abstract

Syntheses and Optical Properties of the Water-Dispersible ZnS:Mn Nanocrystals Surface Capped by L-Aminoacid Ligands: Arginine, Cysteine, Histidine, and Methionine

Cited by 38 publications

References 26 publications

Synthesis and study of catalytic application of l-methionine protected gold nanoparticles

Synthesis and study of catalytic application of l-methionine protected gold nanoparticles

Highly luminescent and biocompatible, l‐citrulline‐capped ZnS:Mn nanocrystals for rapid screening of metal accumulating Lysinibacillus fusiformis bacteria

Thermo‐Optical Properties of Amino Acid Modified ZnO‐PVA Colloidal Suspension Under CW Laser Illumination

Contact Info

Product

Resources

About