12 research outputs found

    ΠŸΠΎΠ»ΡƒΡ‡Π΅Π½Π½Ρ‹Π΅ ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΎΠΌ элСктростатичСского формования Π½Π°Π½ΠΎΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡ‚Ρ‹ Π½Π΅ΠΉΠ»ΠΎΠ½Π° 6, 12 ΠΈ ΠΊΠ»ΠΎΠΈΠ·ΠΈΡ‚Π° 30B для стоматологичСского примСнСния

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    In this study, nylon-nanoclay fibers were prepared by electrospinning. The electrospun membranes were characterized by fourier transform infra red spectroscopy (FTIR), electron microscopy, X-ray diffraction studies (XRD), contact angle and differential scanning calorimetry (DSC) analyses. The incorporation of nanoclay (Cloisite 30B) to the electrospun membrane which was confirmed by transmission electron microscopy (TEM) showed improvements in the overall properties of the membrane. Antimicrobial studies carried out using Enterococcus faecalis and Candida albicans showed that antimicrobial activity of the membrane with higher clay loading was comparable to that of commercially available dental antiseptic, even though lower clay concentrations did not show antimicrobial effects. The incremental addition of the Cloisite 30B resulted in significant increase in the antimicrobial activity and hydrophobicityΠ’ Ρ€Π°Π±ΠΎΡ‚Π΅ Π±Ρ‹Π»ΠΈ ΠΏΠΎΠ»ΡƒΡ‡Π΅Π½Ρ‹ ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΎΠΌ элСктростатичСского формования ΠΈ исслСдованы Π²ΠΎΠ»ΠΎΠΊΠ½Π° ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡ‚Π° Π½Π΅ΠΉΠ»ΠΎΠ½Π° ΠΈ Π½Π°Π½ΠΎΠ³Π»ΠΈΠ½Ρ‹ (ΠΊΠ»ΠΎΠΈΠ·ΠΈΡ‚ 30B). ΠœΠ΅ΠΌΠ±Ρ€Π°Π½Ρ‹ Π±Ρ‹Π»ΠΈ ΠΎΡ…Π°Ρ€Π°ΠΊΡ‚Π΅Ρ€ΠΈΠ·ΠΎΠ²Π°Π½Ρ‹ с ΠΏΠΎΠΌΠΎΡ‰ΡŒΡŽ ИК-спСктроскопии, рСнтгСноструктурного Π°Π½Π°Π»ΠΈΠ·Π°, Π°Π½Π°Π»ΠΈΠ·Π° ΠΊΠΎΠ½Ρ‚Π°ΠΊΡ‚Π½Ρ‹Ρ… ΡƒΠ³Π»ΠΎΠ² ΠΈ Π΄ΠΈΡ„Ρ„Π΅Ρ€Π΅Π½Ρ†ΠΈΠ°Π»ΡŒΠ½ΠΎΠΉ ΡΠΊΠ°Π½ΠΈΡ€ΡƒΡŽΡ‰Π΅ΠΉ ΠΊΠ°Π»ΠΎΡ€ΠΈΠΌΠ΅Ρ‚Ρ€ΠΈΠΈ. Показано, Ρ‡Ρ‚ΠΎ Π²ΠΊΠ»ΡŽΡ‡Π΅Π½ΠΈΠ΅ Π½Π°Π½ΠΎΠ³Π»ΠΈΠ½Ρ‹ Π² ΠΌΠ΅ΠΌΠ±Ρ€Π°Π½Ρ‹, ΠΊΠΎΡ‚ΠΎΡ€ΠΎΠ΅ Π±Ρ‹Π»ΠΎ ΠΏΠΎΠ΄Ρ‚Π²Π΅Ρ€ΠΆΠ΄Π΅Π½ΠΎ с ΠΏΠΎΠΌΠΎΡ‰ΡŒΡŽ ΠΏΡ€ΠΎΡΠ²Π΅Ρ‡ΠΈΠ²Π°ΡŽΡ‰Π΅ΠΉ элСктронной микроскопии, ΠΏΡ€ΠΈΠ²Π΅Π»ΠΎ ΠΊ ΡƒΠ»ΡƒΡ‡ΡˆΠ΅Π½ΠΈΡŽ свойств ΠΌΠ΅ΠΌΠ±Ρ€Π°Π½. ИсслСдования, Π²Ρ‹ΠΏΠΎΠ»Π½Π΅Π½Π½Ρ‹Π΅ с использованиСм Enterococcus faecalis ΠΈ Candida albicans, установили Π°Π½Ρ‚ΠΈΠΌΠΈΠΊΡ€ΠΎΠ±Π½ΡƒΡŽ Π°ΠΊΡ‚ΠΈΠ²Π½ΠΎΡΡ‚ΡŒ ΠΌΠ΅ΠΌΠ±Ρ€Π°Π½ с высоким содСрТаниСм Π³Π»ΠΈΠ½Ρ‹, ΡΠΎΠΏΠΎΡΡ‚Π°Π²ΠΈΠΌΡƒΡŽ с Π°ΠΊΡ‚ΠΈΠ²Π½ΠΎΡΡ‚ΡŒΡŽ ΠΈΠΌΠ΅ΡŽΡ‰ΠΈΡ…ΡΡ Π² ΠΏΡ€ΠΎΠ΄Π°ΠΆΠ΅ антисСптиков, ΠΈΡΠΏΠΎΠ»ΡŒΠ·ΡƒΠ΅ΠΌΡ‹Ρ… Π² стоматологии. Π’ Ρ‚ΠΎ ΠΆΠ΅ врСмя ΠΌΠ΅ΠΌΠ±Ρ€Π°Π½Ρ‹ с Π½ΠΈΠ·ΠΊΠΈΠΌ содСрТаниСм Π³Π»ΠΈΠ½Ρ‹ Π½Π΅ проявляли Π°Π½Ρ‚ΠΈΠΌΠΈΠΊΡ€ΠΎΠ±Π½Ρ‹Ρ… свойств. Π£Π²Π΅Π»ΠΈΡ‡Π΅Π½ΠΈΠ΅ содСрТания ΠΊΠ»ΠΎΠΈΠ·ΠΈΡ‚Π° 30B ΠΏΡ€ΠΈΠ²ΠΎΠ΄ΠΈΠ»ΠΎ ΠΊ сущСствСнному ΡƒΠ²Π΅Π»ΠΈΡ‡Π΅Π½ΠΈΡŽ Π°Π½Ρ‚ΠΈΠ±Π°ΠΊΡ‚Π΅Ρ€ΠΈΠ°Π»ΡŒΠ½ΠΎΠΉ активности ΠΈ гидрофобности ΠΌΠ΅ΠΌΠ±Ρ€Π°

    Thermo- Optic and Nonlinear-Optical studies on CdSe Quantum Dots for Photonic Applications

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    In general, linear- optic, thermo- optic and nonlinear- optical studies on CdSe QDs based nano uids and their special applications in solar cells and random lasers have been studied in this thesis. Photo acous- tic and thermal lens studies are the two characterization methods used for thermo- optic studies whereas Z- scan method is used for nonlinear- optical charecterization. In all these cases we have selected CdSe QDs based nano uid as potential photonic material and studied the e ect of metal NPs on its properties. Linear optical studies on these materials have been done using vari- ous characterization methods and photo induced studies is one of them. Thermal lens studies on these materials give information about heat transport properties of these materials and their suitability for applica- tions such as coolant and insulators. Photo acoustic studies shows the e ect of light on the absorption energy levels of the materials. We have also observed that these materials can be used as optical limiters in the eld of nonlinear optics. Special applications of these materials have been studied in the eld of solar cell such as QDSSCs, where CdSe QDs act as the sensitizing materials for light harvesting. Random lasers have many applications in the eld of laser technology, in which CdSe QDs act as scattering media for the gain.Cochin University of Science & Technolog

    ΠŸΠΎΠ»ΡƒΡ‡Π΅Π½Π½Ρ‹Π΅ ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΎΠΌ элСктростатичСского формования Π½Π°Π½ΠΎΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡ‚Ρ‹ Π½Π΅ΠΉΠ»ΠΎΠ½Π° 6, 12 ΠΈ ΠΊΠ»ΠΎΠΈΠ·ΠΈΡ‚Π° 30B для стоматологичСского примСнСния

    No full text
    In this study, nylon-nanoclay fibers were prepared by electrospinning. The electrospun membranes were characterized by fourier transform infra red spectroscopy (FTIR), electron microscopy, X-ray diffraction studies (XRD), contact angle and differential scanning calorimetry (DSC) analyses. The incorporation of nanoclay (Cloisite 30B) to the electrospun membrane which was confirmed by transmission electron microscopy (TEM) showed improvements in the overall properties of the membrane. Antimicrobial studies carried out using Enterococcus faecalis and Candida albicans showed that antimicrobial activity of the membrane with higher clay loading was comparable to that of commercially available dental antiseptic, even though lower clay concentrations did not show antimicrobial effects. The incremental addition of the Cloisite 30B resulted in significant increase in the antimicrobial activity and hydrophobicityΠ’ Ρ€Π°Π±ΠΎΡ‚Π΅ Π±Ρ‹Π»ΠΈ ΠΏΠΎΠ»ΡƒΡ‡Π΅Π½Ρ‹ ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΎΠΌ элСктростатичСского формования ΠΈ исслСдованы Π²ΠΎΠ»ΠΎΠΊΠ½Π° ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡ‚Π° Π½Π΅ΠΉΠ»ΠΎΠ½Π° ΠΈ Π½Π°Π½ΠΎΠ³Π»ΠΈΠ½Ρ‹ (ΠΊΠ»ΠΎΠΈΠ·ΠΈΡ‚ 30B). ΠœΠ΅ΠΌΠ±Ρ€Π°Π½Ρ‹ Π±Ρ‹Π»ΠΈ ΠΎΡ…Π°Ρ€Π°ΠΊΡ‚Π΅Ρ€ΠΈΠ·ΠΎΠ²Π°Π½Ρ‹ с ΠΏΠΎΠΌΠΎΡ‰ΡŒΡŽ ИК-спСктроскопии, рСнтгСноструктурного Π°Π½Π°Π»ΠΈΠ·Π°, Π°Π½Π°Π»ΠΈΠ·Π° ΠΊΠΎΠ½Ρ‚Π°ΠΊΡ‚Π½Ρ‹Ρ… ΡƒΠ³Π»ΠΎΠ² ΠΈ Π΄ΠΈΡ„Ρ„Π΅Ρ€Π΅Π½Ρ†ΠΈΠ°Π»ΡŒΠ½ΠΎΠΉ ΡΠΊΠ°Π½ΠΈΡ€ΡƒΡŽΡ‰Π΅ΠΉ ΠΊΠ°Π»ΠΎΡ€ΠΈΠΌΠ΅Ρ‚Ρ€ΠΈΠΈ. Показано, Ρ‡Ρ‚ΠΎ Π²ΠΊΠ»ΡŽΡ‡Π΅Π½ΠΈΠ΅ Π½Π°Π½ΠΎΠ³Π»ΠΈΠ½Ρ‹ Π² ΠΌΠ΅ΠΌΠ±Ρ€Π°Π½Ρ‹, ΠΊΠΎΡ‚ΠΎΡ€ΠΎΠ΅ Π±Ρ‹Π»ΠΎ ΠΏΠΎΠ΄Ρ‚Π²Π΅Ρ€ΠΆΠ΄Π΅Π½ΠΎ с ΠΏΠΎΠΌΠΎΡ‰ΡŒΡŽ ΠΏΡ€ΠΎΡΠ²Π΅Ρ‡ΠΈΠ²Π°ΡŽΡ‰Π΅ΠΉ элСктронной микроскопии, ΠΏΡ€ΠΈΠ²Π΅Π»ΠΎ ΠΊ ΡƒΠ»ΡƒΡ‡ΡˆΠ΅Π½ΠΈΡŽ свойств ΠΌΠ΅ΠΌΠ±Ρ€Π°Π½. ИсслСдования, Π²Ρ‹ΠΏΠΎΠ»Π½Π΅Π½Π½Ρ‹Π΅ с использованиСм Enterococcus faecalis ΠΈ Candida albicans, установили Π°Π½Ρ‚ΠΈΠΌΠΈΠΊΡ€ΠΎΠ±Π½ΡƒΡŽ Π°ΠΊΡ‚ΠΈΠ²Π½ΠΎΡΡ‚ΡŒ ΠΌΠ΅ΠΌΠ±Ρ€Π°Π½ с высоким содСрТаниСм Π³Π»ΠΈΠ½Ρ‹, ΡΠΎΠΏΠΎΡΡ‚Π°Π²ΠΈΠΌΡƒΡŽ с Π°ΠΊΡ‚ΠΈΠ²Π½ΠΎΡΡ‚ΡŒΡŽ ΠΈΠΌΠ΅ΡŽΡ‰ΠΈΡ…ΡΡ Π² ΠΏΡ€ΠΎΠ΄Π°ΠΆΠ΅ антисСптиков, ΠΈΡΠΏΠΎΠ»ΡŒΠ·ΡƒΠ΅ΠΌΡ‹Ρ… Π² стоматологии. Π’ Ρ‚ΠΎ ΠΆΠ΅ врСмя ΠΌΠ΅ΠΌΠ±Ρ€Π°Π½Ρ‹ с Π½ΠΈΠ·ΠΊΠΈΠΌ содСрТаниСм Π³Π»ΠΈΠ½Ρ‹ Π½Π΅ проявляли Π°Π½Ρ‚ΠΈΠΌΠΈΠΊΡ€ΠΎΠ±Π½Ρ‹Ρ… свойств. Π£Π²Π΅Π»ΠΈΡ‡Π΅Π½ΠΈΠ΅ содСрТания ΠΊΠ»ΠΎΠΈΠ·ΠΈΡ‚Π° 30B ΠΏΡ€ΠΈΠ²ΠΎΠ΄ΠΈΠ»ΠΎ ΠΊ сущСствСнному ΡƒΠ²Π΅Π»ΠΈΡ‡Π΅Π½ΠΈΡŽ Π°Π½Ρ‚ΠΈΠ±Π°ΠΊΡ‚Π΅Ρ€ΠΈΠ°Π»ΡŒΠ½ΠΎΠΉ активности ΠΈ гидрофобности ΠΌΠ΅ΠΌΠ±Ρ€Π°
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