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Acta Scientific Applied Physics

Review Article Volume 2 Issue 10

Gold Quantum Dots Based Thin Film Fabrication and Topographic Measurements

Arnab Chatterjee1,2*

1Pennsylvania State University, USA
2Indian Institute of Science Education and Research, Trivandrum, India

*Corresponding Author: Arnab Chatterjee, Pennsylvania State University, USA and Indian Institute of Science Education and Research, Trivandrum, India.

Received: September 12, 2022; Published: September 27, 2022

Abstract

The project deals with the synthesis of gold quantum dots coated with didodecyldimethylammonium bromide (DDAB) and their electronic property study by fabricating thin film. Gold is a noble metal, and its quantum dots shows completely different electronic and optical properties than bulk. DDAB coating on gold quantum dots (QDs) gives a layer of positive charge on its surface. Hence, it can form a monolayer or multilayer thin film using the anionic inert polymer as counter layer due to the electrostatic attraction on different substrates. This electrostatic attraction only helps to grow the thin films without disturbing real QDs properties of gold. We prepared our gold QDs using chemical reduction synthesis. The optical property of the thin film has been characterized by UV vis and photoluminescence spectroscopy. The surface topography of the thin film has been characterized using Scanning Tunneling Microscopy. This work shows the successful formation of Gold QDs with a near uniform surface topography.

Keywords: Quantum Dots; STM; Spectroscopy; Gold Nano Particle

References

  1. Xia H B., et al. “Synthesis of Monodisperse Quasi- Spherical Gold Nanoparticles in Water via Silver(I)-Assisted Citrate Reduction”. Langmuir 5 (2010): 3585-3589.
  2. Li PC., et al. “Cationic lipid bilayer coated gold nanoparticles-mediated transfection of mammalian cells”. Biomaterials 26 (2008): 3617-3624.
  3. Zhang LX., et al. “Didodecyldimethylammonium bromide lipid bilayer-protected gold nanoparticles: Synthesis, characterization, and self-assembly”. Langmuir 6 (2006): 2838-2843.
  4. Luther JM., et al. “Localized surface plasmon resonances arising from free carriers in doped quantum dots”. Nature Material5 (2011): 361-366.
  5. Hitoshi Kuwata., et al. “Resonant light scattering from metal nanoparticles: Practical analysis beyond Rayleigh approximation”. Applied Physics Letters 83 (2003): 4625.

Citation

Citation: Arnab Chatterjee. “Gold Quantum Dots Based Thin Film Fabrication and Topographic Measurements". Acta Scientific Applied Physics 2.10 (2022): 14-29.

Copyright

Copyright: © 2022 Arnab Chatterjee This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.



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