Radio frequency plasma polymerized thin film based on eucalyptus oil as low dielectric permittivity, visible and near-infrared (NIR) photoluminescent material

Mol, Beena; James, Jemy; Anoop, K. K.; Sulaniya, Indra; Joseph, Cyriac; Anantharaman, M. R.; Bushiri, M. Junaid

doi:10.1007/s10854-019-01621-5

Cited by 6 publications

(6 citation statements)

References 44 publications

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“…High refractive index values of (PMMA-PVA)/TiO 2 nanocomposite thin films nanocomposite thin films have attracted considerable attention because of their potential applications in advanced optoelectronic devices such as organic light emitting diode devices [7], photoresists for 193-nm immersion lithography [8], high performance substrates for advanced display devices [9], antireflective coatings for advanced optical applications [27] and micro lens components for charge coupled devices or complementary metal oxide semiconductor [10,28]. The optical dielectric constant (ε ) is responsible for the suppression of the speed of light in the medium [29]. The optical dielectric loss (ε") is associated with the absorption of energy from the electric field due to dipole motion [23].…”

Section: Uv-vis Spectroscopymentioning

confidence: 99%

“…Furthermore, increasing TiO 2 -NPs contents in (PMMA-PVA) polymeric thin films leads to an increase slightly of e values in the visible region. The large polarizability of covalent bonds such as C-H, C-C, and C=O, polymeric based thin films demonstrate high dielectric constants [29]. Surprisingly, the values of the real part are relatively larger than those of an imaginary part (ε ε") suggesting that (PMMA-PVA)/TiO 2 nanocomposite thin films exhibit exceptionally small energy dissipation and higher speed of light as light propagates through thin films.…”

Section: Uv-vis Spectroscopymentioning

confidence: 99%

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Synthesis and Characterization of Polymeric (PMMA-PVA) Hybrid Thin Films Doped with TiO2 Nanoparticles Using Dip-Coating Technique

et al. 2021

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We report the synthesis of hybrid thin films based on Poly(MethylMethAcrylate) (PMMA) and Poly(VinylAlcohol) (PVA), doped with different concentrations of titanium dioxide nanoparticles (TiO2 NPs). As-prepared thin films of (PMMA-PVA) doped by TiO2 NPs (wt.% = 2%, 4%, 8%, and 16%) are deposited on glass substrate. Transmittance (T%), reflectance (R%), absorption coefficient (α), optical constants (n and k), and optical dielectric functions (ε1 and ε2) are deduced using the experimental transmittance and reflectance spectra. Furthermore, a combination of classical models such as Tauc, Urbach, Spitzer-Fan, and Drude models are applied to calculate the optical and optoelectronic parameters and the energy gaps of the prepared nanocomposite thin films. The optical bandgap energy of PMMA-PVA thin film is found to be 4.101 eV. Incorporation of TiO2 NPs into PMMA-PVA polymeric thin films leads to a decrease in the optical bandgap and thus bandgap engineering is possible. Fourier-transform infrared spectroscopy (FTIR) transmittance spectra of thin films are measured and interpreted to identify the vibrational modes. To elucidate the chemical stability, thermogravimetric (TGA) curves are measured. We found that (PMMA-PVA)/TiO2 NPs polymeric thin films are thermally stable below 110 °C enable them to be attractive for a wide range of optical and optoelectronic applications.

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Section: Uv-vis Spectroscopymentioning

confidence: 99%

Section: Uv-vis Spectroscopymentioning

confidence: 99%

Synthesis and Characterization of Polymeric (PMMA-PVA) Hybrid Thin Films Doped with TiO2 Nanoparticles Using Dip-Coating Technique

et al. 2021

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“…Glass is an amorphous substrate and silicon is a crystalline substrate, both of them are having different surface energies and there exist lattice mismatch with each other. Since polymers are amorphous in nature, glass substrates may favour the growth of amorphous materials like polymer which in turn help the deposition of thicker films over its surface [29]. AFM images confirmed that the rf plasma polymerized thin films on glass and silicon substrates are homogeneous.…”

Section: Thickness and Surface Morphology Analysismentioning

confidence: 84%

“…From these results, it can be concluded that rf plasma polymerized tea tree oil thin films (T10 G and T10 Si) contains different chromophore units having isolated electron rich conjugated entities, which facilitates the localization of π-electrons. Moreover, this type of electron localization in turn ensures better stability to the polymer films [29].…”

Section: Photoluminescence Studiesmentioning

confidence: 99%

IR spectroscopic and photoluminescence studies of plasma polymerized organic thin films based on tea tree oil

et al. 2020

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Plasma-assisted synthesis of transparent, environment friendly, lightweight, flexible and stable organic thin films from naturally occurring precursors were emerging as potential candidates for organic semiconductor industry. In the present study, tea tree (Malaleuca alternifolia) oil based polymer thin films were deposited on glass and silicon substrate by using radio frequency plasma polymerization technique. The polymer thin films were characterized with atomic force microscopy (AFM) and Fourier transform infrared (FTIR) spectroscopy techniques. AFM images indicate the formation of homogenous film on the substrate surface. FTIR spectra gives bands related to methyl and methylene groups which confirms the formation of chain branching in the polymer films. Relatively intense infrared (IR) bands obtained from films deposited on glass substrate reveals that glass substrate is more favourable for the growth of polymers than silicon substrate. Optical band gap of the polymerized thin film on glass substrate was estimated using Tauc plot which gives a value of 3.19 eV, indicating the semiconducting nature of the material. Photoluminescence (PL) emission in the yellow region were observed from both the samples and its CIE colour coordinates also matches with yellow emission. Broad visible emission observed in the wavelength range 465-695 nm indicates the presence of multichromophores in the polymer film. Samples also gives IR emission in the wavelength range of 850-1090 nm, upon excitation with a wavelength of 785 nm contributed to polaronic transitions.

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“…This trend may be attributed to the slight rotation of thermally activated dipoles [ 35 ]. The high dielectric constants are attributed to the relatively large polarizability of nonpolar bonds such as (C–H), (C–C), and (C=O) [ 36 ]. FTIR spectra measurements of thin films also support the presence of (C–H) and (C=O) bonds [ 1 ].…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Optically Tunable and Thermally Stable PMMA–PVA/CuO NPs Hybrid Nanocomposite Thin Films

et al. 2021

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We report the synthesis and comprehensive characterization of polymethylmethacrylate (PMMA)/polyvinylalcohol (PVA) polymeric blend doped with different concentrations of Copper oxide (CuO) nanoparticles (NPs). The PMMA–PVA/CuO nanocomposite hybrid thin films containing wt.% = 0%, 2%, 4%, 8%, and 16% of CuO NPs are deposited on glass substrates via dip-coating technique. Key optical parameters are measured, analyzed, and interpreted. Tauc, Urbach, Spitzer–Fan, and Drude models are employed to calculate the optical bandgap energy (Eg) and the optoelectronic parameters of PMMA–PVA/CuO nanocomposites. The refractive index and Eg of undoped PMMA–PVA are found to be (1.5–1.85) and 4.101 eV, respectively. Incorporation of specific concentrations of CuO NPs into PMMA–PVA blend leads to a considerable decrease in Eg and to an increase of the refractive index. Moreover, Fourier Transform Infrared Spectroscopy (FTIR) transmittance spectra are measured and analyzed for undoped and doped polymeric thin films to pinpoint the major vibrational modes in the spectral range (500 and 4000 cm−1) as well as to elucidate the nature of chemical network bonding. Thermogravimetric analysis (TGA) is conducted under appropriate conditions to ensure the thermal stability of thin films. Doped polymeric thin films are found to be thermally stable below 105 °C. Therefore, controlled tuning of optoelectronic and thermal properties of doped polymeric thin films by introducing an appropriate concentration of inorganic fillers leads to a smart design of scaled multifunctional devices.

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Radio frequency plasma polymerized thin film based on eucalyptus oil as low dielectric permittivity, visible and near-infrared (NIR) photoluminescent material

Cited by 6 publications

References 44 publications

Synthesis and Characterization of Polymeric (PMMA-PVA) Hybrid Thin Films Doped with TiO2 Nanoparticles Using Dip-Coating Technique

Synthesis and Characterization of Polymeric (PMMA-PVA) Hybrid Thin Films Doped with TiO2 Nanoparticles Using Dip-Coating Technique

IR spectroscopic and photoluminescence studies of plasma polymerized organic thin films based on tea tree oil

Synthesis of Optically Tunable and Thermally Stable PMMA–PVA/CuO NPs Hybrid Nanocomposite Thin Films

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