This activity is dedicated to synthesize the metal oxide semiconductor nanomaterials, form nanostructures on metal oxides and also extract the organic dyes from the plants of Nepal for their possible applications including optoelectronic devices like solar cell. With the expansion of human and infrastructural resources the activities will be extended in the domain of metal nanoparticles as well as polymer materials.
The materials synthesized or extracted in laboratories of the NAST are basically characterized under this activity. Also, this activity covers the service provided to the researchers of other institutions of the country for the characterization of their crystalline solid samples by X-ray Diffraction. To accomplish this task, optimum use of recently installed Bruker D2 Phaser Diffractometer at NAST will be ensured.
All the materials synthesized or extracted in the laboratory will be used for the fabrication of devices under this activity. Emphasis will be given first to apply them in Dye Sensitized Solar Cells(DSSC). With the diversification in the type of materials synthesized and identification of properties during characterization in the laboratory, new areas of their applications will also be sought.
1. Synthesis and Characterization of Different Nanomaterials
Ever since the establishment of Materials Science and Nanotechnology Laboratory at NAST in 2011, synthesis, characterization and application of different nanomaterials are being carried out in the laboratory despite and constraints such as lack of facilities and human resources. Titania nanoparticles and nanotubes preparation through different routes have been successfully accomplished in the laboratory and the materials were even tested for Dye Sensitized Solar Cell (DSSC) and photocatalytic applications. As the latest episode, the laboratory is engaged in synthesis of metal doped titanium dioxide and different types of carbon nanoparticles.
2. X-ray Diffraction Characterization Service
The laboratory was fully dedicated to provide characterization service to the researchers of NAST as well as other academic institutions of Nepal until mid 2020. Currently, the facility is under the custody of Analytical Service Center of NAST. The laboratory already has tested altogether about 800 samples of about 200 researchers during past 8 years. At present, it is the only facility of its kind available in Nepal.
Major Publications of the Laboratory
1. Mahesh Niraula , Subash Adhikari, Deok Yeon Lee, Eun-Kyung Kim, Seog Joon Yoon, Suresh Kumar Dhungel, Wonjoo Lee, Nabeen K. Shrestha , Sung-Hwan Han, Titania nanotube-silver phosphate hybrid heterostructure for improved visible light induced photocatalysis, Chemical Physics Letters 593 (2014) 193–197.
2. Subash Adhikari, Yan-Yan Song, Yong-Mei Wang, Mahesh Niraula, Keumnam Cho, Suresh Kumar Dhungel, Zhi-Da Gao , Nabeen K. Shrestha, Sung-Hwan Han, Electrochemical protonation/de-protonation of titania nanotubes decorated with silver phosphate crystals: An enhanced electrochromic color contrast, Optical Materials 40 (2015) 112-117.
3. Suresh Kumar Dhungel, Chang Woo Park, Impact of Size Distribution of Nanoparticles in TiO2 Paste for its Application in Dye Sensitized Solar Cells, The Himalayan Physics, Vol.4, No.4, July 2013.
4. Suresh Kumar Dhungel, Institutionalizing Nanotechnology in Nepal, Chapter of a Book: Transferring Nanotechnology Concept towards Business Perspectives, NAM S&T Center Publication, 2015, pp 129-138.
1. Dr. Suresh Kumar Dhungel (Team Leader), email@example.com
2. Mr. Pramod Ghimire ( Assistant Research Fellow), firstname.lastname@example.org