4th Edition of International Conference on

Materials Science and Engineering

March 13-15, 2023 | Online Event

Materials 2022

Nandini Bhattacharya

Speaker at Materials Science and Engineering 2022 - Nandini Bhattacharya
TERI-Deakin Nanobiotechnology centre, India

Title : Green synthesized graphene for delivery of plant growth regulators into plants



Research presented in the study explores application of a graphene-based nanodelivery system for the efficient delivery of plant growth regulators. Traditional methods of reduction of graphene oxide (GO) involve chemical and thermal reduction pathways that involve strong chemical agents such as hydrazine. Moreover, these processes release by-products that are toxic in nature and hazardous to the environment, leading to serious environmental problems and furthermore, involve high economic costs. In this work, we demonstrate a simple and green approach of reduction of graphene oxide, where graphene oxide is converted to reduced graphene oxide (rGO) using the culture supernatant as well as whole culture of a diazotrophic bacterial strain, collected from a rice field. Additionally, we have chemically reduced GO by L-ascorbic acid and used it as a reference standard. Subsequently, the rGO has been characterized by UV-visible spectroscopy, SEM, TEM, X-ray diffraction, Raman spectroscopy, Fourier transform infra-red spectroscopy and confocal microscopy. This synthesis process is both environment-friendly and non-toxic. Our results show the successful synthesis of reduced graphene oxide that is comparable to the chemically synthesized rGO prepared by us. Further, this green synthesized rGO shows good potential as a nanocarrier for the delivery of plant growth regulators to crop plants, displaying increased growth parameters of plants. In addition, the rGO synthesized from a biological source demonstrates significant positive effects on plants. Our findings suggest that GO can be reduced by an eco-friendly green approach using bacterial culture supernatant to produce a biocompatible graphene that is suitable for application as a nanofertilizer as well as a delivery vector for plants.

What will audience learn from your presentation?

  • This presentation explores a novel approach of green synthesis of graphene from a microbial source.
  • The possible role of reduced graphene oxide as a plant biostimulant has been demonstrated here.
  • Research in this presentation offers a new approach for the exogenous application of plant growth regulators to plants. Furthermore, this presentation highlights the crucial role of the concentration and time of exposure of nanomaterials to plants, that in turn determine the final impact of the nanomaterial on plants.


Nandini joined the TERI-Deakin Nanobiotechnology centre as a PhD student in nanobiotechnology in 2017. She has presented her work on graphene nanomaterials in several seminars and conferences. Before joining TERI, Nandini was working as a Senior Research fellow at the Indian Institute of Science, Bangalore, India. Her research interests include synthesis of nanomaterials using biological approach, microbiology and plant physiology.