Nanocrystalline patterning of $K_3Li_2Nb_5O_{15}$ on $TeO_2$ glasses by an excimer laser

Ahamad, Niyaz M and Mizuno, Shintaro and Komatsu, Takayuki and Varma, KBR (2007) Nanocrystalline patterning of $K_3Li_2Nb_5O_{15}$ on $TeO_2$ glasses by an excimer laser. In: Journal of Crystal Growth, 304 (1). pp. 270-274.

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Abstract

Glasses in the system (1x)$TeO_2–x(1.5K_2O–Li_2O–2.5Nb_2O_5)(0.02\geq x \geq 0.12$ in mol fraction) were fabricated via the melt-quenching technique. The glassy nature of the as-quenched samples was established by differential scanning calorimetry (DSC). Nanocrystalline patterns (rows of crystallites) were created on the surface of these glasses by an excimer laser $(\lambda =308 nm)$ irradiation. Scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX) and atomic force microscopy (AFM) confirmed the nanostructured nature and composition of the crystallites. X-ray diffraction (XRD) combined with transmission electron microscopic (TEM) studies proved the crystalline phase within and on the surface of the glass to be ferroelectric $K_3Li_2Nb_5O_{15}$. The second-order optical non-linearity (second harmonic generation, SHG) of the nanocrystallites measured by the Maker–Fringe method showed an improvement after exposing to laser radiation.

Item Type:	Journal Article
Publication:	Journal of Crystal Growth
Publisher:	Elsevier B.V.
Additional Information:	Copyright of this article belongs to Elsevier B.V.
Keywords:	A1. Atomic force microscopy;A1. Nanostructures;B1. Glasses;B1. Nanomaterials;B1. Tungsten bronzes;B2. Non-linear optic materials
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	10 Sep 2007
Last Modified:	19 Sep 2010 04:39
URI:	http://eprints.iisc.ac.in/id/eprint/11799

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