Structural and thermal characterization of polyvinylalcohol grafted SiC nanocrystals. (14th July 2017)

• Record Type: Journal Article
• Authors: Saini, Isha; Sharma, Annu; Dhiman, Rajnish; Ram, Sita; Sharma, Pawan K
• Is Part Of: Materials research express. Volume 4:Number 7(2017)
• Publication Date: 2017-07-14
• Subjects: silicon carbide -- grafting -- chemical synthesis -- thermogravimetric analysis; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/aa7a23
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: In the present work, Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, x-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM) were employed to ascertain the grafting of an organic layer of polyvinyl alcohol (PVA) onto the surface of semiconducting SiC nanocrystals using a novel method. FTIR spectroscopy reveals the introduction of new peaks corresponding to various functional groups of PVA alongwith the presence of characteristic Si–C vibrational peak in the spectra of grafted SiC nanocrystals. Raman spectra depict the presence of changes introduced in the characteristic TO and LO mode of vibration of SiC nanocrystals after grafting procedure. XRD analysis confirmed that the grafting procedure did not alter the crystalline geometry of SiC nanocrystals. TEM and SEM images further support the FTIR and Raman spectroscopic results and confirm the presence of PVA layer around SiC nanocrystals. Thermal degradation behavior of PVA-g-SiC nanocrystals has been studied using TGA analysis.