Los Angeles

Research Article Open Access

Hybrid structures of Si Nanocrystals-Carbon Nanotubes with bead architecture

Sangeeta Semwal1*, Sarab P. Singh2, Vasant D. Vankar2

Sangeeta Semwal1*, Sarab P. Singh2, Vasant D. Vankar2

1Nanotechnology Initiatives Division, Department of Electronics & Information Technology,

 Ministry of Communications and Information Technology, Electronics Niketan, 6 CGO Complex,

 New Delhi, 110003, India

2Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India

Adv. Mater. Proc., 2016, 1 (1), 6

DOI: 10.5185/amp.2016/102

Publication Date (Web):05 September 2016

Copyright © IAAM-VBRI Press

Abstract


Abstract

In present work, hybrid structures of Si Nanocrystals (Si-ncs) and Carbon Nanotubes (CNTs) with bead-like architecture have been synthesized by exposing pristine CNTs to silane (SiH4) at 200 ºC. The exposed CNTs were annealed in Ar ambient at 500ºC in a catalytic chemical vapor deposition chamber. High-resolution transmission electron microscopy (HRTEM) elucidated that the bead-like architecture has well-defined crystalline nature. X-ray photoelectron spectroscopy (XPS) was used to study the nature of chemical bonding and structural functionalization/defects caused by silane exposure and annealing on the nanotube surface. XPS results indicated in-diffusion of Si in the CNT cavity as well reduction in oxygen content on the top surface of the CNTs. X-ray diffractometry was used to further confirm the formation of the crystalline hybrid structures. From the present work it is inferred that a controlled synthesis of hybrid structures (CNT-Si ncs) with bead-like architecture can be achieved by a simple CVD method for various applications 

Keywords


Carbon nanotubes, Si nanocrystals, high resolution transmission electron microscopy, X-ray diffractometry, X-ray Photoelectron Spectroscopy.