Chemical bath deposition synthesis of sub-micron ZnS-coated polystyrene

Huang, Kevin; Rajendran, Poorna; Liddell, Chekesha M.

doi:10.1016/j.jcis.2006.11.057

Cited by 23 publications

(16 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…One strategy is to employ a protective layer on ZnS surface to enhance the chemical stability and avoid the agglomeration and oxidation of ZnS at high temperatures [6,7]. A typical example is coating ZnS with silica [8][9][10][11], and reported to be more stable against electron beam or UV light irradiation compared to uncoated ZnS [12,13], or embedding ZnS in polymers [14,15].…”

Section: Introductionmentioning

confidence: 99%

Structural and optical properties of ZnS/niobate composites synthesized by exfoliation/self-assembly processing

Chen

Zhou

Yang

et al. 2010

Journal of Solid State Chemistry

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Structural and optical properties of ZnS/niobate composites synthesized by exfoliation/self-assembly processing

Chen

Zhou

Yang

et al. 2010

Journal of Solid State Chemistry

View full text Add to dashboard Cite

“…The effective refractive index ( n eff ), calculated as a weighted volume fraction average ( f ) of the real refractive indices of the contributing media:

n_{eff} = f_{PS - MPTMS} \times n_{PS - MPTMS} + (1 - f_{PS - MPTMS}) \times n_{Z r O_{2}}

where n is the refractive index. As illustrated in the previous formulas, the refractive index and the content of inorganic nanoparticles in the matrix offer a great contribution to the refractive index of hybrid materials.…”

Section: Resultsmentioning

confidence: 98%

Preparation and properties of polystyrene–γ‐methacryloxypropyl trimethoxy silane copolymer/zirconia nanohybrid materials

Tong

Song

et al. 2013

J of Applied Polymer Sci

View full text Add to dashboard Cite

Polystyrene (PS)-c-methacryloxypropyl trimethoxy silane (MPTMS) copolymer/zirconia (ZrO 2 ) nanohybrid materials were successfully prepared by the combination of solvothermal and in situ synthesis methods, in which the comonomer was used as chemical bonding agent between the nanoparticles and the matrix, and acetylacetone (AcAc) was used as a size control agent of ZrO 2 in the PS matrix. Then, a new transparency film with a relatively high refractive index (1.72) was successfully obtained, in which ZrO 2 could be dispersed well in the PS-MPTMS matrix. Field emission scanning electron microscopy images indicated that AcAc was helpful in the dispersion of the nanoparticles, and smaller ZrO 2 particles with no aggregation were obtained in the PS-MPTMS matrix. The structure and thermal properties of the hybrid films were investigated by Fourier transform infrared spectroscopy and thermogravimetric analysis, and the surface properties were also examined.

show abstract

“…Any opinions and views expressed in this publication are the opinions and views of the authors, and are not the views of or endorsed by Taylor ZnS is therefore considered one of the most promising materials which find applications in optoelectronic devices, blue emitting diodes, electroluminescent devices and others [3,4]. It is also known that the direct band gap of nanomaterials can be controlled by doping, using polymer coating [12] and manipulating synthesis conditions. In order to receive radiation in the visible region, ZnS used to be doped by transition metals, such as Mn 2þ , Cu 2þ and Ni 2þ [5][6][7][8].…”

Section: Please Scroll Down For Articlementioning

confidence: 99%

Thin films containing Mn-doped ZnS nanocrystals synthesised by chemical method and study of some of their optical properties

Thi

Hiền

Thu

et al. 2013

Journal of Experimental Nanoscience

View full text Add to dashboard Cite

In this article, we present the optical properties of thin films containing Mn-doped ZnS nanocrystals synthesised by the chemical method. The ZnS nanoparticles within the polymer matrix (polyvinyl alcohol) were investigated by SEM and TEM images and analysed by X-ray diffraction. The effect of polymer concentration on the direct band gap of Mn-doped ZnS thin films was calculated from the data for absorption measurements. The values of the band gap are in the range of 3.73-3.90 eV. In addition, we discuss the photoluminescence of these films. IntroductionZnS nanomaterials are semiconductor materials with direct band gap larger than that of ZnO. The direct band gap of ZnS is 3.6 eV for a bulk ZnS material, and this can reach 3.98 eV for a ZnS nanomaterial at 300 K [1], or 4.4 eV [2] in a Wurzite structure. Moreover, the melting temperatures of A II B VI materials are very high. ZnS is therefore considered one of the most promising materials which find applications in optoelectronic devices, blue emitting diodes, electroluminescent devices and others [3,4].ZnS nanoparticles radiate luminescence with a wavelength of 420-480 nm. In order to receive radiation in the visible region, ZnS used to be doped by transition metals, such as Mn 2þ , Cu 2þ and Ni 2þ [5][6][7][8]. It is known that the optical properties of nanomaterials show they are highly sensitive to synthesis conditions [9][10][11] and are dependent on the type on precursor used, pH level, doping concentration and temperature regime. It is also known that the direct band gap of nanomaterials can be controlled by doping, using polymer coating [12] and manipulating synthesis conditions. As certain polymers (polyvinyl alcohol (PVA), polyacrylic, polystyrene) are transparent to visible light, they will not have any effect on the emission wavelengths of ZnS nanoparticles when they are being diffused into the polymer matrix. On the contrary, these polymers can prevent nanoparticles from aggregating, in the mechanism of steric and electrostatic stabilisation. Thus, polymer coating plays a role in providing a protective environment for ZnS nanoparticles [1,2].Previous results on the optical properties of ZnS:Mn showed that the luminescence intensity increased considerably with an optimal nominal Mn concentration of about 9-10% [13].

show abstract

Chemical bath deposition synthesis of sub-micron ZnS-coated polystyrene

Cited by 23 publications

References 29 publications

Structural and optical properties of ZnS/niobate composites synthesized by exfoliation/self-assembly processing

Structural and optical properties of ZnS/niobate composites synthesized by exfoliation/self-assembly processing

Preparation and properties of polystyrene–γ‐methacryloxypropyl trimethoxy silane copolymer/zirconia nanohybrid materials

Thin films containing Mn-doped ZnS nanocrystals synthesised by chemical method and study of some of their optical properties

Contact Info

Product

Resources

About