Students interested in summer internships are requested to please apply through the academies or IIT programs

Welcome to the nano group at the Department of Chemistry, Indian Institute of Technology, Delhi. The group was established in July 2008. We finally moved to our renovated lab in January 2010. Since then our group has been involved in the synthesis and applications of nanomaterials with an aim towards optical applications. The group is interested in studying the changes that can be brought about in nanomaterials as a function of various synthesis parameters. We develop a number of new nano-heterostructures and study the basic principles governing their charge dynamics. Through the links on this webpage, you will also find a number of bio-applications being developed based on these materials. We are also interested in developing materials for photovoltaics and photocatalysis. Please check here for updates on the activities of the group.

News

January 2022

Swati presented her work in International Conference on Emerging Trends in Nanomaterials Science & Technology (ICETNMST 2022). She received the best speaker award.

February 2022

Congratulations Ajeet, Samim, our DFT collaborator Dibyajyoti, the electrochemists Jyoti and Pravin and the imaging team Trupthi and Pralay: the work on MoSe2/SnS Nanoheterostructures for Water Splitting is accepted in ACS Applied Nano Materials

March 2022

Congratulations Swati, Samim, Priyesh and our DFT collaborator Dibyajyoti: the work on Charge Transfer Kinetics in CsPbBr₃-CdSe/CdS/ZnS Nanohybrids is accepted in J. Phys. Chem. Lett.

More good news rolls in. Priyesh has been awarded the best poster presentation award in the 2nd International Conference on Nanomaterials for Energy Conversion and Storage Applications (NECSA - 2022) held at Pandit Deendayal Energy University from 19th-21ar Jan 2022.

"Insight into morphology dependent charge carrier dynamics in ZnSe-CdS nanoheterostructures" - long due work that was part of Mona's thesis is now published in Phys. Chem. Chem. Phys. Congratulations to all the people involved - Mona, Jayanta, Franziska, HN Ghosh, Nadja

July 2022

"Doping Mn2+ in hybrid Ruddlesden Popper phase of layered double perovskite (BA)4AgBiBr8" - Priyesh's first paper with Swati's contributions is now published in Nanotechnology Congratulations!

August 2022

Jyoti joins the group for PhD. She is interested in devices!!

September 2022

Mona and Samim are awarded the "Distinction in Doctoral Research" for the years 2018 and 2020, respectively. This is a proud moment for the group. Congratulations and keep up the good work!

December 2022

Samim joins the group of Prof. Andrey Rogach for a postdoc. Wish you all the best for your future!

"Self-Trapped Excitons Mediated Energy Transfer to Sm³⁺ in Cs₂AgIn_(1-x)Sm_xCl₆:Bi Double Perovskite Nanocrystals" - now accepted in J Phys Chem C. Congratulations Rachna, Ajeet, Raman, Shubham.

January 2023

The work on "Defect Passivation Results in Stability of Cesium Lead Halide Perovskite Nanocrystals" has been now accepted in J. Phys. Chem. C , (2023). due to the combined efforts of Swati, Samim, Priyesh, Trupthi, Manash, Pralay, Dibyajyoti. Congratulations to the entire team. The stability of perovskites has been improved dramatically and this work will open up new avenues in the perovskite photovoltaics.

The work on "Elucidating the Mn²⁺ Dopant Sites in Two-Dimensional Na-In Halide Perovskite" has been now accepted in J Phys Chem C. Congratualtions to Priyesh, Deepika, Swati, Raman and Saswata whose combined efforts made these results possible.

March 2023

Swati and Rachna are chosen for the best poster awards at 'National Conference on Perovskite Society of India-(PSIM-2023)' at roorkee from 1st to 3rd March

June 2023

Formation of MoSe2-CdS NHS and a new methodology to synthesize CdSe NCs is now accepted in J. Phys. Chem. C 127, 11298 (2023). Congratulations to the entire team led by Sahil.

Priyesh presented his thesis synopsis on 6th.

July 2023

Rachna bags the best poster award at NaNaX-10 held in Klosterneuburg, Austria from 3-7 july

Suvadeep and Deepak join the group for their MSc project. Welcome :)

Raman presented his thesis synopsis on 5th.

August 2023

Isha presented her thesis synopsis on 23rd.

October 2023

Priyesh and Raman defended their respective thesis sucessfully. Both of them have got postdoc offers and are ready for their next phase. All the best.

November 2023

Shradhha and Umesh have joined the group for the photodetector project. Welcome :)

December 2023

Priyesh and the team has managed to dope Tb³⁺ in layered Pb-free double perovskites. See Adv. Opt. Mater. (2024). The emission efficiency is pretty impressive for the f-f transitions. Congratulations to the entire team.

Varsha gets the best poster award at the 60th Annual Convention of Chemists, ACC 2023, held on 20th & 21st December at IIT Delhi.

January 2024

Swati presented her thesis synopsis on 23rd.

February 2024

Our work on NbSeS 2D TMD nanosheets is now out in J. Mater. Chem. A (2024). Congratulations to Varsha and the coworkers Samim, Ankita, Shubham, Sahil, Jyoti and Dibyajyoti.

Congratulations to Raman, Shubham, Pulkit, Priyesh, Swati, Varsha, Sahil, Aswathi for extending the absorption of Cs₂AgBiCl₆ Double Perovskite to Near Infra-Red Region by Doping Copper - results out in J. Mater. Chem. C

May 2024

Shubham alongwith Raman, Sanchi, Varsha, Rachna, Suvadip and Saswata enhance the NIR emission in lead free vacancy ordered perovskites - see the paper in Chem. Mater.

Priyesh, Swati with theoretical inputs from Deepika, Saswata and crystal structure solved by Atiqur with inputs from Sajesh could control the optical band gap of layered perovskites by Fe alloying- see the paper in Chem. Mater.

Suvadip has been selected for pursuing PhD at the University of Hamburg with Prof Dr Nadja Bigall. Congratulations!!

Finally Swati has managed to stop anion migration in perovskite NC films with the help of Priyesh, Priyadharsini, Samim, Deepak. Results are out in Chem. Commun.

Rachna has been long trying to understand the self-trapped exciton dynamics in double perovskites. The results are now published in Nano Lett. - with inputs from Ajeet and Shubham.