ZnSe/PVP nanocomposites: Synthesis, structural and nonlinear optical analysis

Divyasree, M.C.; Shiju, E; Francis, Jobin; Anusha, P. T.; Rao, S. Venugopal; Chandrasekharan, K.

doi:10.1016/j.matchemphys.2017.04.069

Cited by 29 publications

(4 citation statements)

References 33 publications

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“…[4,5] Optical limitters offers normal transmittance under ambient condition and attenuates significantly under intense beams. [1][2][3] A number of materials like porphyrins, [6] phthalocyanines, [6,7] fullerenes, [1] nanoparticles (NPs) [8] and nanocomposites [9] were investigated for optical limitting (OL) applications. Non-linear absorption, nonlinear refraction and non-linear scattering are the major non-linear mechanism responsible for limiting action.…”

Section: Introductionmentioning

confidence: 99%

An insight into phenomenal optical non‐linearities arising from synergistic relationship between selected BODIPYs and noble metal nanoparticles

Edappadikkunnummal

Prasannan

Francis

et al. 2020

Applied Organom Chemis

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Materials with large and quick non-linear optical response, excellent photo thermal stability, cost effectiveness and off resonant non-linear absorption (NLA) are essential requirements for a good optical limiting (OL). Among them, organic systems and π-conjugated polymers are getting special interest because of their flexibility in structural modification that leads to the tuning of optical and electronic properties that are suitable for working under large bandwidth. Here, we report a drastic enhancement of non-linear optical activity and exceptional OL action of two organic-inorganic hybrid system based on BODIPY and Au and Ag nanoparticles (NPs). The organic system taken was certain set of BODIPYs with different substitution at the para and meta positions. All the compounds were found to be exhibiting good reverse saturable absorption (RSA) behaviour and negative non-linear refraction property. An attempt was made to improve the non-linear optical (NLO) property of the BODIPY by forming nanohybrids with Au and Ag NPs, and the best NLO active candidate among the studied system was chosen for it. A significant enhancement in NLO property was observed on hybrid system formation. The optical limiting (OL) threshold of the hybrid (1 J/cm 2) was reduced almost 1/5 times than that of the parent compound (5.2 J/cm 2), and this value is comparable with the benchmark OL materials like C 60. The mechanism behind the NLA is found to be the combination of excited state absorption (ESA) and twophoton absorption (TPA). The enhanced NLA and OL action of C Ag/Au nanohybrids are attributed to the synergetic effect among the two parent components as well as the local field effects of NPs. Enhancement in non-linear optical property is found to be stronger in hybrid system with Au NPs and is due to the resonant charge transfer and intense local field effect on exciting with 532-nm pulse compared with that of Ag NPs. Both the parent compounds and the nanohybrids exhibit negative non-linearity, and the non-linear

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Section: Introductionmentioning

confidence: 99%

An insight into phenomenal optical non‐linearities arising from synergistic relationship between selected BODIPYs and noble metal nanoparticles

Edappadikkunnummal

Prasannan

Francis

et al. 2020

Applied Organom Chemis

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“…3(a), FTIR spectra of the PVP polymer reveal an absorption band at 3 275.90 cm -1 that can be attributed to the O-H (and C-H) stretching of carboxylic acid groups, as well as a band of 2 913.98 cm -1 attributed to the asymmetric stretching of CH 2 [21]. In addition, peaks at 1 733.39 and 1 655.39 cm -1 confirm the existence of aldehyde and asymmetric stretching of C-O, respectively [22,23], and evidence of CH 2 wagging and N−C stretching were observed at 1 241.30 and 1 088.48 cm -1 , respectively. Finally, a peak at 839.80 cm −1 can be attributed to a C-C bond [22].…”

Section: Resultsmentioning

confidence: 85%

The Structural and Optical Properties of Polyvinyl Pyrrolidone-doped with Zinc Selenide

Hadi,

Mohammed,

Musa

et al. 2024

Nano Biomedicine and Engineering

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This study describes a method for solution casting of polyvinyl pyrrolidone (PVP) reinforced with 0 wt.%, 1 wt.%, 3 wt.%, and 5 wt.% zinc selenide (ZnSe). After production, scanning electron microscopy (SEM) was used to examine the nanocomposite surfaces, and thus confirmed the constant dispersion of ZnSe nanoparticles (NPs) within PVP. Subsequent Fourier transformation infrared spectroscopy (FTIR) analysis showed that the ZnSe NPs and PVP matrix interacted physically. Analysis of the optical properties of PVP-ZnSe nanocomposites showed that increased ZnSe NPs concentration in the PVP solution increased absorbance and decreased transmittance. Further integration of ZnSe NPs at a concentration of 6 wt.% within the PVP-ZnSe nanocomposite resulted in a decrease in the energy gap. Specifically, we observed a decrease in the energy gap from 4 to 3.1 eV for the allowed indirect transition and from 3.94 to 2.9 eV for the forbidden indirect transition. Overall, the weight percentage of ZnSe NPs demonstrates a direct relationship with their absorption factor, extinction factor, index of refraction, real and imaginary components of dielectric constants, and optical conductivity. These results indicate that PVP-ZnSe nanocomposites possess exceptional optical capabilities, and may be suitable for use in photodetector applications, especially as ultraviolet (UV) detectors.

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“…[58,59] This feature has important applications in the protection of eyes and sensors from intense laser damage. [60,61] Comparing S1-S4, at each incident power density, the normalized transmittance at the focus point increases as the annealing temperature increases. This result is consistent with the above mentioned and the probable reason is that the defect states reduced by thermal treatment.…”

Section: Nonlinear Optical Absorptionmentioning

confidence: 99%

Influence of Annealing Temperature Modulation on the Structural and Optical Properties of ZnSe Thin Films

Yuan

Liu

et al. 2021

Crystal Research and Technology

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The research work is devoted to study the influence of annealing temperature on the structural and optical properties of ZnSe thin films. The samples are prepared by a thermal evaporation technique and part of the as-deposited films are annealed. X-ray diffraction patterns and Raman spectra analysis reveal that the ZnSe thin films have cubic zinc-blende crystal structure and the crystallinity increases as the annealing temperature increases. For the linear optical parameters, the absorption edge moves to shorter wavelengths with the increase of annealing temperature. Based on Swanepoel's method, the refractive index, film thickness, absorption coefficient and optical band gap are determined. The values of band gap are found to increase from 2.63 to 2.68 eV as the annealing temperature increases. By performing an open aperture Z-scan technique with femtosecond pulses under 800 nm wavelength, all ZnSe samples show two-photon absorption responses. It is found that the modulation depth and the two-photon absorption coefficient decrease with increasing annealing temperature. Moreover, all samples exhibit better optical limiting responses at higher incident power intensities. These novel properties render this a promising material for traditional optoelectronic devices and optical limiters.

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ZnSe/PVP nanocomposites: Synthesis, structural and nonlinear optical analysis

Cited by 29 publications

References 33 publications

An insight into phenomenal optical non‐linearities arising from synergistic relationship between selected BODIPYs and noble metal nanoparticles

An insight into phenomenal optical non‐linearities arising from synergistic relationship between selected BODIPYs and noble metal nanoparticles

The Structural and Optical Properties of Polyvinyl Pyrrolidone-doped with Zinc Selenide

Influence of Annealing Temperature Modulation on the Structural and Optical Properties of ZnSe Thin Films

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