Research in Advanced Materials
Materials are fundamental to many technological applications such as LEDs, Photovoltaics, Spintronics, Sensors, etc. Progress in today’s world mainly depends on the development of new materials and engineering/tuning their properties for any desired application.
Advanced Materials group in the Department is focussed on the development of new advanced materials through innovative synthesis techniques and extensive studies/characterizations on structural, microstructural, optical, electrical and magnetic properties usingconventional techniques, such as XRD, SEM/TEM, optical, electrical and magnetic measurements. In addition, specialized techniques, such as Neutron Diffraction, Near-Edge X-ray Absorption Fine Structure (NEXAFS) and X-ray Magnetic Circular Dichroism (XMCD), etc. are being used through collaborations with national institutes and institutions abroad.
Ongoing research Activities:
- Solid State Ionics and Radiation Damage studies (RD)
- Physics of inorganic glass, glass-ceramics and nano-composites (RVA and BE)
- Multiferroics and Metal Oxide – Carbon Nanomaterials (BA)
- Nanoferrites (BRS)
Multiferroics and Metal Oxide – Carbon Nanomateri
Faculty involved: Dr.Basavaraj Angadi
Mrs.Sunanda T Dadami
Mr.Chandrashekhar H D
Multiferroics (in collaboration with UGC-DAE-CSR, Mumbai)
Synthesis by modified solid-state-reaction methods to achieve single phase in various multiferroic systems such as, Pb(Fe1/2Nb1/2)O3 (PFN) – Pb(Fe2/3W1/3)O3 (PFW) and BiFeO3 (BF) – PFN (PFW). Studies on these multiferroic systems to probe magneto-electric and spin-lattice coupling using temperature dependent dielectric (ferroelectric), magnetic, Mossbauer and Neutron diffraction across transition temperatures (TC and TN). The anomalies in the magnetic and dielectric properties across the transition temperature give qualitative understanding of magneto-electric coupling.
Nanomaterials (Pure and doped ZnO, TiO2, SnO2) – Synthesis using solution combustion technique and characterization through XRD, TEM, Magnetic, Mossbauer, NEXAFS, XMCD, etc for applications in spintronics as a DMS.
Thin films (Pure and doped ZnO, TiO2, SnO2) – Deposition through RF sputtering, Spin coating, and Spray pyrolysis and characterization through XRD, AFM, Optical (UV-Vis., PL) and electrical for applications in electro-optics, Sensing and transparent conducting electrodes.
Metal Oxide – Carbon Materials core-shell quantum-dots (In collaboration with KIST, Seoul, Korea)
Synthesis of Graphene, ZnO-Graphene, ZnO- C60 core-shell quantum-dots using simple chemical method, characterizing through XRD, HR-TEM, Raman, Photoluminescence, etc. and then utilizing as an active material in organic-inorganic materials based hybrid structures for fabricating white-light emitting diodes, UV-photovoltaic cells, etc..
Preparation of semiconductor quantum dots and their applications in the fabrication of inverted polymer solar cells.
- Cu-doped ZnO-based p–n hetero-junction light emitting diode, JB Kim, D Byun, SY Ie, DH Park, WK Choi, JW Choi, B Angadi, Semiconductor Science and Technology 23 (2008) 095004.
- Chemical exfoliation of pure graphene sheets from synthesized ZnO–graphene quasi core–shell quantum dots, DI Son, BW Kwon, HH Kim, DH Park, B Angadi, WK Choi, Carbon 59 (2013) 289-295.
- Low temperature magnetic studies on PbFe0.5Nb0.5O3 multiferroic, S Matteppanavar, B Angadi, S Rayaprol, Physica B: Condensed Matter, 448 (2014) 229–232
- Spectroscopic investigation of an intrinsic room temperature ferromagnetism in Co doped ZnO nanoparticles, N Srinatha, B Angadi, KGM Nair, NG Deshpande, YC Shao, WF Pong, Journal of Electron Spectroscopy and Related Phenomena 195 (2014) 179-184.Enhanced Photovoltaic Performance of Inverted Polymer Solar Cells Utilizing Multifunctional Quantum-Dot Monolayers, Byung Joon Moon, Sungjae Cho, Kyu Seung Lee, Sukang Bae, Sanghyun Lee, Jun Yeon Hwang, Basavaraj Angadi, Yeonjin Yi, Min Park, Dong Ick Son, Advanced Energy Materials, 5 (2015) 1401130 (IF : 14.385)Emissive ZnO-graphene quantum dots for white-light-emitting diodes, DI Son, BW Kwon, DH Park, WS Seo, Y Yi, B Angadi, CL Lee, WK Choi, Nature Nanotechnology 7 (2012) 465-471.