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Synthesis and Optical Properties of Semiconductor Nanomaterials

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Photochemistry".

Deadline for manuscript submissions: closed (30 September 2021) | Viewed by 2870

Special Issue Editor


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Guest Editor
ENFOCAT-IN2UB, Universitat de Barcelona, Barcelona, Spain
Interests: nanomaterials; optical properties; semiconductors; synthesis
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Semiconductor nanomaterials have enormous potential as building blocks for next-generation devices in different fields, including electronics, optoelectronics, energy harvesting and sensing at the nanoscale. In order to showcase the most recent advancements, this Special Issue aims to collect the latest research on semiconductor nanomaterials and their applications. Topics of interest include but are not limited to:

Crystal growth: bulk growth, epitaxial growth, doping and point defects, growth methods, and related technology;

Characterization: optical and electrical properties, structural analysis, and theory and simulation;

Applications: visible, UV, and white LEDs, micro LEDs, laser diodes, solar cells, detectors, transistors, diodes and photocatalysts.

Full papers, short communications, and review articles presenting and discussing the most recent trends in the field are welcome.

Prof. Dr. Frank Güell
Guest Editor

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Keywords

  • semiconductors
  • nanomaterial
  • nanowires
  • nanoparticles
  • nanotubes
  • LEDs
  • laser diodes
  • transistors
  • photocatalysts
  • photoelectrode
  • solar cells
  • photoluminescence
  • optical properties

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Published Papers (1 paper)

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Research

12 pages, 4411 KiB  
Article
Surface Enhanced Raman Scattering in Graphene Quantum Dots Grown via Electrochemical Process
by Rangsan Panyathip, Sukrit Sucharitakul, Surachet Phaduangdhitidhada, Athipong Ngamjarurojana, Pisist Kumnorkaew and Supab Choopun
Molecules 2021, 26(18), 5484; https://doi.org/10.3390/molecules26185484 - 9 Sep 2021
Cited by 19 | Viewed by 2536
Abstract
Graphene Quantum dots (GQDs) are used as a surface-enhanced Raman substrate for detecting target molecules with large specific surface areas and more accessible edges to enhance the signal of target molecules. The electrochemical process is used to synthesize GQDs in the solution-based process [...] Read more.
Graphene Quantum dots (GQDs) are used as a surface-enhanced Raman substrate for detecting target molecules with large specific surface areas and more accessible edges to enhance the signal of target molecules. The electrochemical process is used to synthesize GQDs in the solution-based process from which the SERS signals were obtained from GQDs Raman spectra. In this work, GQDs were grown via the electrochemical process with citric acid and potassium chloride (KCl) electrolyte solution to obtain GQDs in a colloidal solution-based format. Then, GQDs were characterized by transmission electron microscope (TEM), Fourier-transform infrared spectroscopy (FTIR), and Raman spectroscopy, respectively. From the results, SERS signals had observed via GQDs spectra through the Raman spectra at D (1326 cm−1) and G (1584 cm−1), in which D intensity is defined as the presence of defects on GQDs and G is the sp2 orbital of carbon signal. The increasing concentration of KCl in the electrolyte solution for 0.15M to 0.60M demonstrated the increment of Raman intensity at the D peak of GQDs up to 100 over the D peak of graphite. This result reveals the potential feasibility of GQDs as SERS applications compared to graphite signals. Full article
(This article belongs to the Special Issue Synthesis and Optical Properties of Semiconductor Nanomaterials)
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