Enhanced optical limiting in polystyrene–ZnO nanotop composite films

Haripadmam, P. C.; John, Honey; Philip, Reji; Gopinath, Pramod

doi:10.1364/ol.39.000474

Cited by 10 publications

(7 citation statements)

References 19 publications

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“…The optical nonlinearity in the nanocomposite films was then investigated using open aperture Z-scan technique, and the results indicated that OL was due to TPA from ZnO with an efficiency of more than 50%. In a similar pattern, other authors 345 investigated the OL properties of polystyrene−ZnO nanotop composite films, using an open aperture Z-scan technique with ns pulses at 532 nm. The nanocomposites were prepared via spin-and dipcoating with different loads of ZnO.…”

Section: Nanocrystalsmentioning

confidence: 99%

Nonlinear Optical Materials for the Smart Filtering of Optical Radiation

2016

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The control of luminous radiation has extremely important implications for modern and future technologies as well as in medicine. In this Review, we detail chemical structures and their relevant photophysical features for various groups of materials, including organic dyes such as metalloporphyrins and metallophthalocyanines (and derivatives), other common organic materials, mixed metal complexes and clusters, fullerenes, dendrimeric nanocomposites, polymeric materials (organic and/or inorganic), inorganic semiconductors, and other nanoscopic materials, utilized or potentially useful for the realization of devices able to filter in a smart way an external radiation. The concept of smart is referred to the characteristic of those materials that are capable to filter the radiation in a dynamic way without the need of an ancillary system for the activation of the required transmission change. In particular, this Review gives emphasis to the nonlinear optical properties of photoactive materials for the function of optical power limiting. All known mechanisms of optical limiting have been analyzed and discussed for the different types of materials.

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Section: Nanocrystalsmentioning

confidence: 99%

Nonlinear Optical Materials for the Smart Filtering of Optical Radiation

2016

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“…On increasing the temperature, the response increases; when the thermal energy reaches the boundary to bridge the activation energy barrier of the reaction, the charge volume dramatically increases and causes a high response behavior. After crossing the optimum temperature, desorption of oxygen molecules occurs from the ZnO thin film, which decreases the response [13]. The response of an ethanol gas sensor was increased dramatically when A. indica dye extract was introduced in ZnO NPs.…”

Section: Sensitivity Analysismentioning

confidence: 99%

“…Gas sensors based on the nanostructures of MOSs have a high sensitivity with short response and recovery Molecules 2021, 26, 7685 2 of 16 times [12]. In addition to the chemical properties of MOSs, the surface morphology and surface-to-volume ratio also affect the relative change in resistance of MOS gas sensors [13].…”

Section: Introductionmentioning

confidence: 99%

“…The biological production of ZnO NPs utilizing plant extracts, such as leaves, roots, flowers, and seeds as a bio template, is of particular interest to researchers [12]. This green technique has various advantages, including environmentally friendliness, shorter time, lower-cost precursors, and a higher-purity result; the handling procedure is easy and does not require expensive equipment [13]. Many studies have been conducted on the green synthesis of ZnO NPs by plant leaves such as Ixora Coccinea, Artocarpus gomezianus, Coptidis rhizoma, Citrus aurantifolia, Zingiber officinalis, Cyanometraramiflora, A. indica, and others [19,20].…”

Section: Introductionmentioning

confidence: 99%

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Study on the Synthesis of ZnO Nanoparticles Using Azadirachta indica Extracts for the Fabrication of a Gas Sensor

et al. 2021

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This paper compared the effects of A. indica plant proteins over chemical methods in the morphology of zinc oxide nanoparticles (ZnO NPs) prepared by a co-precipitation method, and ethanol sensing performance of prepared thin films deposited over a fluorene-doped tin oxide (FTO) bind glass substrate using spray pyrolysis technique. The average crystallite sizes and diameters of the grain-sized cluster ZnO NPs were 25 and (701.79 ± 176.21) nm for an undoped sample and 20 and (489.99 ± 112.96) nm for A. india dye-doped sample. The fourier transform infrared spectroscopy (FTIR) analysis confirmed the formation of the Zn–O bond at 450 cm−1, and also showed the presence of plant proteins due to A. indica dye extracts. ZnO NPs films exhibited good response (up to 51 and 72% for without and with A. indica dye-doped extracts, respectively) toward ethanol vapors with quick response-recovery characteristics at a temperature of 250 °C for undoped and 225 °C for A. indica dye-doped ZnO thin films. The interaction of A. indica dye extracts helps to decrease the operating temperature and increased the response and recovery rates of the sensor, which may be due to an increase in the specific surface area, resulting in adsorption of more oxygen and hence high response results.

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“…1 A wide variety of materials including inorganic and organic semiconductors, natural and synthetic nanomaterials, molecular dyes, and polymer systems, 2–9 display nonlinear optical properties which have found use in variety of applications. 10–16 Organic nonlinear optical materials, in particular, have attracted major attention due to their wide scope and ability to maximize a nonlinear response by tailored modification of their molecular structure. 17–25 Established nonlinear optical organic materials such as the pyrrole-based porphyrins, pthalocyanines and aza/azo-benzenes, possess a large number of delocalized π-electrons, with band-gaps of 2-3 eV and reasonably high nonlinearities.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear optical properties of multipyrrole dyes

Frenette¹,

Hatamimoslehabadi²,

Bellinger-Buckley³

et al. 2014

Chemical Physics Letters

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The nonlinear optical properties of a series of pyrrolic compounds consisting of BODIPY and aza-BODIPY systems are investigated using 532 nm nanosecond laser and the Z-scan technique. Results show that 3,5-distyryl extension of BODIPY to the red shifted MeO2BODIPY dye has a dramatic impact on its nonlinear absorption properties changing it from a saturable absorber to an efficient reverse saturable absorbing material with a nonlinear absorption coefficient of 4.64 × 10−10 m/W. When plotted on a concentration scale per mole of dye in solution MeO2BODIPY far outperforms the recognized zinc(II) phthalocyanine dye and is comparable to that of zinc(II) tetraphenylporphyrin.

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Enhanced optical limiting in polystyrene–ZnO nanotop composite films

Cited by 10 publications

References 19 publications

Nonlinear Optical Materials for the Smart Filtering of Optical Radiation

Nonlinear Optical Materials for the Smart Filtering of Optical Radiation

Study on the Synthesis of ZnO Nanoparticles Using Azadirachta indica Extracts for the Fabrication of a Gas Sensor

Nonlinear optical properties of multipyrrole dyes

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