Indo-Japan International Collaboration on ‘Rapid Synthesis of Noble Metal-Dielectric Nanomaterials for Plasmonic Applications’

The International collaboration between the Sri Sathya Sai Institute of Higher Learning (SSSIHL), India and Japan Advanced Institute of Science and Technology (JAIST), Japan began in the year 2015 with multiple teams working together from both the institutions. Over the years, the collaboration has grown stronger with multiple student exchanges and internships between the two institutions to work on numerous projects.

In one such successful project, a new research study is now published in Physica E: Low-dimensional Systems and Nanostructures. In this research work, STAR Lab, SSSIHL and Matsumi Lab, JAIST have explored the use of 2D Titania nanotube (TiNT) and its Gold (Au) and Platinum (Pt)-nanoparticles decorated analogues for achieving augmented fluorescence emission using the surface plasmon-coupled emission (SPCE) platform.

Motivation

• Need for alternative 2D materials for plasmon-coupled fluorescence emission enhancement
• Extensive use of 2-Dimensional (2D) carbon material in the past for achieving augmented fluorescence emission
• 2D materials such as graphene has π-plasmons that can induce significant π–π interactions with the fluorophores resulting in decreased fluorescence emission
• Pure graphene is expensive and its synthesis involves cumbersome procedures

Research outcome

• The use of alternative, 2D-carbon type material- TiNT for plasmonic application
• Rapid (30 seconds) electrochemical synthesis of hybrid metal-dielectric spacer and cavity material (Au@TiNT, Pt@TiNT and AuPt@Pt-TiNT) for plasmonic applications
• Novel use of 2D-TiNT and Au and Pt-decorated TiNT in SPCE platform to achieve an excess of 100-fold fluorescence emission enhancement
• Purcell factor-based understanding of enhancement form hybrid metal-dielectric Pt@TiNT

Authors

• STAR Laboratory, Department of Chemistry, Sri Sathya Sai Institute of Higher Learning: Bebeto Rai, Dr. Venkatesh Srinivasan and Dr. Sai Sathish Ramamurthy
• Matsumi Lab, Japan Advanced Institute of Science and Technology-Japan: Dr. Santhosh Bukka and Prof. Noriyoshi Matsumi

Journal: Physica E: Low-dimensional Systems and Nanostructures

Read Paper Here: https://doi.org/10.1016/j.physe.2021.114868