SAHNAWAZ AHMED

Scopus Publications

Quantum confinement vs. mesoporosity in SnO2: oxygen vacancies dictate dominant formate selectivity in hybrid CO2 electrolysis with unprecedented 480 mV energy savings
Souradip Ganguly, Pooja Basera, Kajari Dutta, Sukanta Saha, Arnab Dutta, et al.
Journal of Materials Chemistry A, 2026
Hybrid co-electrolysis integrates CO 2 reduction with biomass oxidation for efficient formic acid production. Surface-engineered SnO 2 nanoflowers enhance charge transfer, selectivity, and sustainable carbon valorization using earth-abundant catalyst.
Chemically-Fueled Time-Gated Luminescent Metamorphosis
Sahnawaz Ahmed, Sk Areful Islam, Malay Kumar Baroi, Basab Kanti Das, Bapan Pramanik
Advanced Materials, 2025
Recent quest for emulating lifelike smart materials for developing functional outcomes has been spurred by the unparalleled spatiotemporal control of natural systems. However, it is still highly challenging to replicate the progressive time‐dependent programmable features of biological systems, such as adaptive broad‐spectrum luminescence accompanying functions. Here in, a chemically‐fueled transient hydrogel is created based on an aggregation‐induced emission‐active peptide conjugate (NI‐VD). The fuel‐driven anhydride formation, NI‐VD‐An, which results in transient hydrogelation and an evolution in emission from green to blue. The process's autonomous reversibility on successive anhydride hydrolysis over time enables the emission characteristics of the system to be dynamically modulated. Importantly, selective fluorophore trapping inside the chemically‐fueled transient hydrogel network can achieve the programmable multicolor emission ranging from blue, green, white, yellow, red, and purple. For the first time, fuel‐powered such an ephemeral hydrogel network potentially acts as a time‐dependent donor in Förster Resonance Energy Transfer (FRET) processes toward the entrapped acceptors as well as a distance modulator of the donor‐acceptor pairs, causing dynamic regulation of the emission properties. The exploration advances beyond the fundamental investigation of the transient hydrogel platform producing time‐gated multicolor emission to the translation of spatiotemporal pattern development and precisely controlled time‐coded information encryption.
Substrate-controlled regioselective C(sp2)-H sulfonylation of ortho-aminophenols
Yogesh Brijwashi Sharma, Radheshyam Sharma, Deepu Raveend, Aakriti Garg, Sahnawaz Ahmed, et al.
Chemical Communications, 2025
Cu(ii)-catalyzed regioselective ortho-sulfonylation of 2-aminophenols with arylsulfonyl hydrazides via a single-electron-transfer mechanism under aerial conditions has been disclosed.
Ultrashort Peptide Hydrogels Biomaterials with Potent Antibacterial Activity
Bapan Pramanik, Payel Mukherjee, Sahnawaz Ahmed
Chemistry an Asian Journal, 2025
For the past few decades, ultrashort peptide hydrogels have been at the forefront of biomaterials due to their unique properties like biocompatibility, tunable mechanical properties, and potent antibacterial activity. These ultrashort peptides self‐assemble into a hydrogel matrix with nanofibrous networks. In this minireview, we have explored the design and self‐assembly of these ultrashort peptide hydrogels by focusing on their antibacterial properties. Cationic and hydrophobic residues are incorporated to engineer the peptides, facilitating interaction with bacterial membranes and leading to membrane disruption and cell death. The hydrogels exhibit broad‐spectrum antibacterial activity against both Gram‐positive and Gram‐negative bacteria. Overall, this minireview highlights the potential of ultrashort peptide hydrogels as versatile and practical antibacterial biomaterials, providing a novel approach to combating bacterial infections and addressing the growing challenge of antibiotic resistance.
Luminescent ultrashort peptide hydrogelator with enhanced photophysical implications and biocompatibility
Aanchal Kumari, Gitanjali Bangal, Basab Kanti Das, Malay Kumar Baroi, Mamta Kumari, et al.
Journal of Materials Chemistry B, 2025
A novel ultra-short peptide hydrogelator capable of exhibiting excellent aggregation-induced emission and biocompatible features that have been exploited for in vitro cellular imaging.
Trace Ru Incorporation Boosted Co2P Nanorods for Superior Water Electrolysis and Substrate-Paired Electrolysis Toward Value-Added Chemicals in Alkaline Medium
Souradip Ganguly, Pooja Basera, Sahnawaz Ahmed, Sukanta Saha, Arnab Dutta, et al.
Small, 2024
Electro‐valorization of biomass‐derived chemicals has ensured sustainable production of value‐added products, an effective approach for reducing carbon footprint, through renewable energy. Electrochemical oxidation and reduction reactions in aqueous media using H2O as a potential source for active hydrogenated and oxygenated species fulfill the purpose. In this study, Ru─Co2P nanorods are explored as a bifunctional electrocatalyst toward valorization of Organics at basic media. The in‐situ electrogenerated Co3+ and Co4+ species act as active oxidants toward product selectivity. An overpotential of 68 mV is found for hydrogen evolution reaction (1 m NaOH) with Ru─Co2P. Further, used as cathode, Ru─Co2P effectively reduces furfuraldehyde to furfuryl alcohol and p‐nitrophenol to p‐aminophenol. Ru doping enables ease of formation of active species both for reduction and oxidation, faster charge transfer between catalyst to absorbates. Density Functional Theory calculation establishes Ru incorporation in Co2P surface results in enhanced adsorption of substrates. Ru doping modulates the electronic structure of Co2P which changes the density of states resulting in faster water dissociation and water splitting. To reach 10 mA cm−2 current density only 1.6 V is required for water electrolysis, whereas 1.4 V is enough for substrate‐paired electrolysis with simultaneous oxidation of benzyl alcohol and reduction of p‐nitro phenol.
Spatiotemporally Controlled Release of Etamsylate from Bioinspired Peptide-Functionalized Nanoparticles Arrests Bleeding Rapidly and Improves Clot Stability in a Rabbit Internal Hemorrhage Model
Soumyadip Mukherjee, Pranabesh Kumar Sasmal, Kolimi Prashanth Reddy, Anubroto Pal, Debajyoti Pal, et al.
ACS Biomaterials Science and Engineering, 2024
Chemically fueled dynamic switching between assembly-encoded emissions
Manirul Islam, Malay Kumar Baroi, Basab Kanti Das, Aanchal Kumari, Krishnendu Das, et al.
Materials Horizons, 2024
EDC fueled dynamic switching between two distinct emissive aggregates formed by a naphthalimide-peptide building block (NI-VLD), and spatiotemporal control over the material properties.
Disulphide Cross-Linked Ultrashort Peptide Hydrogelator for Water Remediation
Basab Kanti Das, Raju Samanta, Sahnawaz Ahmed, Bapan Pramanik
Chemistry A European Journal, 2023
A single amino acid in a peptide sequence can play an important role to tune the self‐assembly and hydrogelation behaviour. Here, a C‐terminal cysteine‐containing ultrashort peptide hydrogelator forms hydrogel through non‐covalent and covalent interactions. Interestingly, the hydrogel is insoluble in water and buffer solutions at different pH values (1‐13) and is thixotropic and injectable. In recent years, removing dyes from contaminated water has become a significant concern because of the shortage of freshwater resources. Therefore, the adsorption of dyes through a reliable, straightforward, nontoxic, cheap, and environmentally friendly adsorbent has become a popular topic. Hence, the hydrogelator was exploited to remove organic dyes from wastewater, harnessing its applicability in the gel phase and solid supports (filter paper and cotton).
Peptide-Based Low Molecular Weight Photosensitive Supramolecular Gelators
Bapan Pramanik, Sahnawaz Ahmed
Gels, 2022
Over the last couple of decades, stimuli-responsive supramolecular gels comprising synthetic short peptides as building blocks have been explored for various biological and material applications. Though a wide range of stimuli has been tested depending on the structure of the peptides, light as a stimulus has attracted extensive attention due to its non-invasive, non-contaminant, and remotely controllable nature, precise spatial and temporal resolution, and wavelength tunability. The integration of molecular photo-switch and low-molecular-weight synthetic peptides may thus provide access to supramolecular self-assembled systems, notably supramolecular gels, which may be used to create dynamic, light-responsive “smart” materials with a variety of structures and functions. This short review summarizes the recent advancement in the area of light-sensitive peptide gelation. At first, a glimpse of commonly used molecular photo-switches is given, followed by a detailed description of their incorporation into peptide sequences to design light-responsive peptide gels and the mechanism of their action. Finally, the challenges and future perspectives for developing next-generation photo-responsive gels and materials are outlined.
Supramolecular fibrillation of peptide amphiphiles induces environmental responses in aqueous droplets
Richard Booth, Ignacio Insua, Sahnawaz Ahmed, Alicia Rioboo, Javier Montenegro
Nature Communications, 2021
Cross-β amyloid nanotubes for hydrolase-peroxidase cascade reactions
Ayan Chatterjee, Syed Pavel Afrose, Sahnawaz Ahmed, Akhil Venugopal, Dibyendu Das
Chemical Communications, 2020
Unorthodox Combination of Cation-π and Charge-Transfer Interactions within a Donor-Acceptor Pair
Bapan Pramanik, Sahnawaz Ahmed, Nilotpal Singha, Basab Kanti Das, Payel Dowari, et al.
Langmuir, 2019
Chemically Fueled Dissipative Self-Assembly that Exploits Cooperative Catalysis
Subhajit Bal, Krishnendu Das, Sahnawaz Ahmed, Dibyendu Das
Angewandte Chemie International Edition, 2019
Fatty acid based transient nanostructures for temporal regulation of artificial peroxidase activity
Sahnawaz Ahmed, Ayan Chatterjee, Krishnendu Das, Dibyendu Das
Chemical Science, 2019
Unusual confinement properties of a water insoluble small peptide hydrogel
Nilotpal Singha, Arpita Srivastava, Bapan Pramanik, Sahnawaz Ahmed, Payel Dowari, et al.
Chemical Science, 2019
Multiple Cross-Linking of a Small Peptide to Form a Size Tunable Biopolymer with Efficient Cell Adhesion and Proliferation Property
Payel Dowari, Shriya Saha, Bapan Pramanik, Sahnawaz Ahmed, Nilotpal Singha, et al.
Biomacromolecules, 2018
Solvent Directed Morphogenesis and Electrical Properties of a Peptide-Perylenediimide Conjugate
Sahnawaz Ahmed, Kandan Natarajan Amba Sankar, Bapan Pramanik, Kallol Mohanta, Debapratim Das
Langmuir, 2018
Solvent Assisted Tuning of Morphology of a Peptide-Perylenediimide Conjugate: Helical Fibers to Nano-Rings and their Differential Semiconductivity
Sahnawaz Ahmed, Bapan Pramanik, K. N. Amba Sankar, Abhinav Srivastava, Nilotpal Singha, et al.
Scientific Reports, 2017
Hydrogelation of a Naphthalene Diimide Appended Peptide Amphiphile and Its Application in Cell Imaging and Intracellular pH Sensing
Nilotpal Singha, Purnima Gupta, Bapan Pramanik, Sahnawaz Ahmed, Antara Dasgupta, et al.
Biomacromolecules, 2017
Self-Assembly Assisted Tandem Sensing of Pd2+ and CN− by a Perylenediimide-Peptide Conjugate
Bapan Pramanik, Sahnawaz Ahmed, Nilotpal Singha, Debapratim Das
Chemistryselect, 2017
A DNA-NDI Hybrid to Efficiently Detect Histone in Parts per Trillion (ppt) Level
Bapan Pramanik, Sahnawaz Ahmed, Rupam Roy, Basab K. Das, Nilotpal Singha, et al.
Chemistryselect, 2017
A Viologen–Perylenediimide Conjugate as an Efficient Base Sensor with Solvatochromic Property
Bapan Pramanik, Julfikar Hassan Mondal, Nilotpal Singha, Sahnawaz Ahmed, Jyotirmayee Mohanty, et al.
Chemphyschem, 2017
Redox controlled reversible transformation of a supramolecular alternating copolymer to a radical cation containing homo-polymer
Sahnawaz Ahmed, Nilotpal Singha, Bapan Pramanik, Julfikar Hassan Mondal, Debapratim Das
Polymer Chemistry, 2016
Reversible deformation-formation of a multistimuli responsive vesicle by a supramolecular peptide amphiphile
Julfikar Hassan Mondal, Sahnawaz Ahmed, Titli Ghosh, Debapratim Das
Soft Matter, 2015
Dual self-sorting by cucurbit[8]uril to transform a mixed micelle to vesicle
Julfikar Hassan Mondal, Titli Ghosh, Sahnawaz Ahmed, Debapratim Das
Langmuir, 2014
Physicochemical analysis of mixed micelles of a viologen surfactant: Extended to water-in-oil (w/o) microemulsion and cucurbit[8]uril-assisted vesicle formation
Julfikar Hassan Mondal, Sahnawaz Ahmed, Debapratim Das
Langmuir, 2014
Self-assembly of peptide-amphiphile forming helical nanofibers and in situ template synthesis of uniform mesoporous single wall silica nanotubes
Sahnawaz Ahmed, Julfikar Hassan Mondal, Nibedita Behera, Debapratim Das
Langmuir, 2013

RECENT SCHOLAR PUBLICATIONS

Quantum Confinement vs. Mesoporosity in SnO2: Oxygen Vacancies Dictate Dominant Formate Selectivity in Hybrid CO2 Electrolysis with Unprecedented 480 mV Energy Savings
S Ganguly, P Basera, K Dutta, A Saha, Sukanta, Dutta, A Sharma, ...
Journal of Materials Chemistry A 14 (21), 13095-13107 , 2026
2026
Chemically-Fueled Time-Gated Luminescent Metamorphosis
S Ahmed, SA Islam, MK Baroi, BK Das, B Pramanik
Advanced Materials 37 (47), e09789 , 2025
2025
Citations: 4
Substrate controlled regioselective C(sp2)–H sulfonylation of ortho-aminophenols
BY Sharma, R Sharma, D Raveend, A Garg, S Ahmed, MM Guru
Chemical Communications 61 (46), 8383-8386 , 2025
2025
Ultrashort Peptide Hydrogels Biomaterials with Potent Antibacterial Activity
B Pramanik, P Mukjerjee, S Ahmed
Chemistry An Asian Journal 20 (5), e202401137 , 2025
2025
Citations: 4
Luminescent Ultrashort Peptide Hydrogelator with Enhanced Photophysical Implications and Biocompatibility
A Kumari, G Bangal, BK Das, MK Baroi, M Kumari, P Das, KP Reddy, ...
Journal of Materials Chemistry B 13 (14), 4406–4418 , 2025
2025
Citations: 5
Trace Ru Incorporation Boosted Co2P Nanorods for Superior Water Electrolysis and Substrate-Paired Electrolysis Toward Value-Added Chemicals in Alkaline Medium
S Ganguly, P Basera, S Ahmed, S Saha, A Dutta, C Loha, S Ghosh
Small 20 (52), 2405056 , 2024
2024
Citations: 18
Spatiotemporally Controlled Release of Etamsylate from Bioinspired Peptide-Functionalized Nanoparticles Arrests Bleeding Rapidly and Improves Clot Stability in a Rabbit …
S Mukherjee, PK Sasmal, KP Reddy, A Pal, D Pal, SK Nandi, A Chanda, ...
ACS Biomaterials Science and Engineering 10 (8), 5014-5026 , 2024
2024
Citations: 3
Materials Horizons Emerging Investigator Series: Dr Sahnawaz Ahmed, National Institute of Pharmaceutical Education and Research (NIPER) Kolkata, India
S Ahmed
Materials Horizons 11 (13), 2997-2998 , 2024
2024
Chemically fueled dynamic switching between assembly-encoded emissions†
M Islam, MK Baroi, BK Das, A Kumari, K Das, S Ahmed
Materials Horizons 11 (23), 3104-3114 , 2024
2024
Citations: 4
Cover Feature: Disulphide Cross‐Linked Ultrashort Peptide Hydrogelator for Water Remediation (Chem. Eur. J. 37/2023)
B Kanti Das, R Samanta, S Ahmed, B Pramanik
Chemistry–A European Journal 29 (37), e202301626 , 2023
2023
Citations: 1
Disulphide Cross-Linked Ultrashort Peptide Hydrogelator for Water Remediation
BK Das, R Samanta, S Ahmed, B Pramanik
Chemistry- A European Journal 29 (37), e202300312 , 2023
2023
Citations: 11
Peptide-based low molecular weight photosensitive supramolecular gelators
B Pramanik, S Ahmed
Gels 8 (9), 533 , 2022
2022
Citations: 35
Supramolecular fibrillation of peptide amphiphiles induces environmental responses in aqueous droplets
R Booth, I Insua, S Ahmed, A Rioboo, J Montenegro
Nature Communications 12 (1), 6421 , 2021
2021
Citations: 41
Cross-β amyloid nanotubes for hydrolase–peroxidase cascade reactions
A Chatterjee, SP Afrose, S Ahmed, A Venugopal, D Das
Chemical Communications 56 (57), 7869-7872 , 2020
2020
Citations: 49
Unusual confinement properties of a water insoluble small peptide hydrogel
N Singha, A Srivastava, B Pramanik, S Ahmed, P Dowari, S Chowdhuri, ...
Chemical Science 10 (23), 5920-5928 , 2019
2019
Citations: 55
Fatty acid based transient nanostructures for temporal regulation of artificial peroxidase activity
S Ahmed, A Chatterjee, K Das, D Das
Chemical Science 10 (32), 7574-7578 , 2019
2019
Citations: 27
Chemically Fueled Dissipative Self‐Assembly that Exploits Cooperative Catalysis
S Bal, K Das, S Ahmed, D Das
Angewandte Chemie International Edition 58 (1), 244-247 , 2019
2019
Citations: 199
Unorthodox combination of cation− π and charge-transfer interactions within a donor–acceptor pair
B Pramanik, S Ahmed, N Singha, BK Das, P Dowari, D Das
Langmuir 35 (2), 478-488 , 2018
2018
Citations: 47
Multiple cross-linking of a small peptide to form a size tunable biopolymer with efficient cell adhesion and proliferation property
P Dowari, S Saha, B Pramanik, S Ahmed, N Singha, A Ukil, D Das
Biomacromolecules 19 (10), 3994-4002 , 2018
2018
Citations: 21
Solvent directed morphogenesis and electrical properties of a peptide–perylenediimide conjugate
S Ahmed, KN Amba Sankar, B Pramanik, K Mohanta, D Das
Langmuir 34 (28), 8355-8364 , 2018
2018
Citations: 28

MOST CITED SCHOLAR PUBLICATIONS

Chemically Fueled Dissipative Self‐Assembly that Exploits Cooperative Catalysis
S Bal, K Das, S Ahmed, D Das
Angewandte Chemie International Edition 58 (1), 244-247 , 2019
2019
Citations: 199
Self-assembly of peptide-amphiphile forming helical nanofibers and in situ template synthesis of uniform mesoporous single wall silica nanotubes
S Ahmed, JH Mondal, N Behera, D Das
Langmuir 29 (46), 14274-14283 , 2013
2013
Citations: 71
Hydrogelation of a naphthalene diimide appended peptide amphiphile and its application in cell imaging and intracellular pH sensing
N Singha, P Gupta, B Pramanik, S Ahmed, A Dasgupta, A Ukil, D Das
Biomacromolecules 18 (11), 3630-3641 , 2017
2017
Citations: 64
Solvent assisted tuning of morphology of a peptide-perylenediimide conjugate: helical fibers to nano-rings and their differential semiconductivity
S Ahmed, B Pramanik, KNA Sankar, A Srivastava, N Singha, P Dowari, ...
Scientific reports 7 (1), 9485 , 2017
2017
Citations: 56
Unusual confinement properties of a water insoluble small peptide hydrogel
N Singha, A Srivastava, B Pramanik, S Ahmed, P Dowari, S Chowdhuri, ...
Chemical Science 10 (23), 5920-5928 , 2019
2019
Citations: 55
Reversible deformation–formation of a multistimuli responsive vesicle by a supramolecular peptide amphiphile
JH Mondal, S Ahmed, T Ghosh, D Das
Soft Matter 11 (24), 4912-4920 , 2015
2015
Citations: 53
Cross-β amyloid nanotubes for hydrolase–peroxidase cascade reactions
A Chatterjee, SP Afrose, S Ahmed, A Venugopal, D Das
Chemical Communications 56 (57), 7869-7872 , 2020
2020
Citations: 49
Unorthodox combination of cation− π and charge-transfer interactions within a donor–acceptor pair
B Pramanik, S Ahmed, N Singha, BK Das, P Dowari, D Das
Langmuir 35 (2), 478-488 , 2018
2018
Citations: 47
Supramolecular fibrillation of peptide amphiphiles induces environmental responses in aqueous droplets
R Booth, I Insua, S Ahmed, A Rioboo, J Montenegro
Nature Communications 12 (1), 6421 , 2021
2021
Citations: 41
Peptide-based low molecular weight photosensitive supramolecular gelators
B Pramanik, S Ahmed
Gels 8 (9), 533 , 2022
2022
Citations: 35
Physicochemical analysis of mixed micelles of a viologen surfactant: Extended to water-in-oil (w/o) microemulsion and cucurbit [8] uril-assisted vesicle formation
JH Mondal, S Ahmed, D Das
Langmuir 30 (28), 8290-8299 , 2014
2014
Citations: 35
Dual self-sorting by cucurbit [8] uril to transform a mixed micelle to vesicle
JH Mondal, T Ghosh, S Ahmed, D Das
Langmuir 30 (39), 11528-11534 , 2014
2014
Citations: 34
Redox controlled reversible transformation of a supramolecular alternating copolymer to a radical cation containing homo-polymer
S Ahmed, N Singha, B Pramanik, JH Mondal, D Das
Polymer Chemistry 7 (26), 4393-4401 , 2016
2016
Citations: 31
Solvent directed morphogenesis and electrical properties of a peptide–perylenediimide conjugate
S Ahmed, KN Amba Sankar, B Pramanik, K Mohanta, D Das
Langmuir 34 (28), 8355-8364 , 2018
2018
Citations: 28
Fatty acid based transient nanostructures for temporal regulation of artificial peroxidase activity
S Ahmed, A Chatterjee, K Das, D Das
Chemical Science 10 (32), 7574-7578 , 2019
2019
Citations: 27
A viologen–perylenediimide conjugate as an efficient base sensor with solvatochromic property
B Pramanik, JH Mondal, N Singha, S Ahmed, J Mohanty, D Das
ChemPhysChem 18 (2), 245-252 , 2017
2017
Citations: 25
Multiple cross-linking of a small peptide to form a size tunable biopolymer with efficient cell adhesion and proliferation property
P Dowari, S Saha, B Pramanik, S Ahmed, N Singha, A Ukil, D Das
Biomacromolecules 19 (10), 3994-4002 , 2018
2018
Citations: 21
Self‐Assembly Assisted Tandem Sensing of Pd2+ and CN− by a Perylenediimide‐Peptide Conjugate
B Pramanik, S Ahmed, N Singha, D Das
ChemistrySelect 2 (31), 10061-10066 , 2017
2017
Citations: 20
Trace Ru Incorporation Boosted Co2P Nanorods for Superior Water Electrolysis and Substrate-Paired Electrolysis Toward Value-Added Chemicals in Alkaline Medium
S Ganguly, P Basera, S Ahmed, S Saha, A Dutta, C Loha, S Ghosh
Small 20 (52), 2405056 , 2024
2024
Citations: 18
Disulphide Cross-Linked Ultrashort Peptide Hydrogelator for Water Remediation
BK Das, R Samanta, S Ahmed, B Pramanik
Chemistry- A European Journal 29 (37), e202300312 , 2023
2023
Citations: 11

SAHNAWAZ AHMED

RESEARCH, TEACHING, or OTHER INTERESTS

Scopus Publications

RECENT SCHOLAR PUBLICATIONS

MOST CITED SCHOLAR PUBLICATIONS