Sudipta Gupta
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View article: Cholesterol modulates membrane elasticity via unified biophysical laws
Cholesterol modulates membrane elasticity via unified biophysical laws Open
View article: OPTIMISATION OF PROCESS PARAMETERS FOR JOINING AISI 409 STAINLESS STEEL AND MILD STEEL BY USING MIG WELDING
OPTIMISATION OF PROCESS PARAMETERS FOR JOINING AISI 409 STAINLESS STEEL AND MILD STEEL BY USING MIG WELDING Open
Considering various aspects like performance parameters, cost effectiveness, saving energy, environmental concern it has been observed that joining of metals, which are dissimilar in nature, has a versatile use in the field of Electronics,…
View article: Building a Simplistic Automatic Extruder: Instrument Development Opportunities for the Laboratory
Building a Simplistic Automatic Extruder: Instrument Development Opportunities for the Laboratory Open
This work presents an automatic extruder as a research experience for undergraduate students. The system offers a user-friendly approach to preparing vesicles, such as liposomes or polymersomes, with a defined size and polydispersity-prope…
View article: Ion-Mediated Structural Discontinuities in Phospholipid Vesicles
Ion-Mediated Structural Discontinuities in Phospholipid Vesicles Open
Despite intense research, methods for controlling soft matter's spontaneous self-assembly into well-defined layers remain a significant challenge. We observed ion-induced structural discontinuities of phospholipid vesicles that can be expl…
View article: Building a Simplistic Automatic Extruder: Instrument Development Opportunities for the Laboratory
Building a Simplistic Automatic Extruder: Instrument Development Opportunities for the Laboratory Open
A well-rounded introduction to work in a STEM laboratory is vital to scientific education. Besides the ability to use available instrumentation for sample characterization, students should also be imparted knowledge in the steps of instrum…
View article: Dynamics of nano-scale assemblies of amphiphilic PEG-PDMS-PEG copolymers
Dynamics of nano-scale assemblies of amphiphilic PEG-PDMS-PEG copolymers Open
Micelles and vesicles are promising candidates in targeted drug/gene delivery, bioreactors, and templates for nanoparticle synthesis. We investigated the morphology and dynamics of PEG-PDMS-PEG triblock copolymer nano-scale assemblies rega…
View article: Ion-Mediated Structural Discontinuities in Phospholipid Vesicles
Ion-Mediated Structural Discontinuities in Phospholipid Vesicles Open
Despite intense research, methods for controlling soft matter's spontaneous self-assembly in-to well-defined layers remain a significant challenge. We observed ion-induced structural disconti-nuities of phospholipid vesicles that can be ex…
View article: Acetaminophen Interactions with Phospholipid Vesicles Induced Changes in Morphology and Lipid Dynamics
Acetaminophen Interactions with Phospholipid Vesicles Induced Changes in Morphology and Lipid Dynamics Open
Acetaminophen (APAP) or Paracetamol, despite its wide and common use for pain and fever symptoms, shows a variety of side effects, toxic effects, and overdose effects. The most common form of toxic effects of APAP is in the liver where pho…
View article: Manipulating Phospholipid Vesicles at the Nanoscale: A Transformation from Unilamellar to Multilamellar by an <i>n</i>-Alkyl-poly(ethylene oxide)
Manipulating Phospholipid Vesicles at the Nanoscale: A Transformation from Unilamellar to Multilamellar by an <i>n</i>-Alkyl-poly(ethylene oxide) Open
We investigated the influence of an n-alkyl-PEO polymer on the structure and dynamics of phospholipid vesicles. Multilayer formation and about a 9% increase in the size in vesicles were observed by cryogenic transmission electron mi…
View article: The dynamic face of lipid membranes
The dynamic face of lipid membranes Open
Lipid membranes envelope live cells and mediate vital biological functions through regulated spatiotemporal dynamics. This review highlights the role of neutron scattering, among other approaches, in uncovering the dynamic properties of li…
View article: Influence of NaCl on shape deformation of polymersomes
Influence of NaCl on shape deformation of polymersomes Open
Polymersomes frequently appear in the literature as promising candidates for a wide range of applications from targeted drug delivery to nanoreactors.
View article: Platter of my Heart: Negotiating and affirming identities through culinary heritages in a diasporic land in Jhumpa Lahiri's Mrs Sen's
Platter of my Heart: Negotiating and affirming identities through culinary heritages in a diasporic land in Jhumpa Lahiri's Mrs Sen's Open
The cuisine and culinary practices of every geographically demarcated region has a major contribution towards its cultural history, heritage and inheritance. They become a mark of identity for the creation of a homogeneous community as wel…
View article: Influence of External NaCl Salt on Membrane Rigidity of Neutral DOPC Vesicles
Influence of External NaCl Salt on Membrane Rigidity of Neutral DOPC Vesicles Open
Sodium chloride (NaCl) is a very common molecule in biotic and abiotic aqueous environments. In both cases, variation of ionic strength is inevitable. In addition to the osmotic variation posed by such perturbations, the question of whethe…
View article: Structure and dynamics of DOPC vesicles: A transformation from unilamellar to multilamellar vesicles by n-alkyl-PEO polymer
Structure and dynamics of DOPC vesicles: A transformation from unilamellar to multilamellar vesicles by n-alkyl-PEO polymer Open
We investigate the influence of a non-ionic surfactant like polymer on phospholipid vesicles. Our results from cryogenic transmission electron microscopy (cryo-TEM), dynamic light scattering (DLS), small angle neutron and X-ray scattering …
View article: Structure and dynamics of DOPC vesicles: A transformation from\n unilamellar to multilamellar vesicles by n-alkyl-PEO polymer
Structure and dynamics of DOPC vesicles: A transformation from\n unilamellar to multilamellar vesicles by n-alkyl-PEO polymer Open
We investigate the influence of a non-ionic surfactant like polymer on\nphospholipid vesicles. Our results from cryogenic transmission electron\nmicroscopy (cryo-TEM), dynamic light scattering (DLS), small angle neutron and\nX-ray scatteri…
View article: Lignin-Graft-Poly(lactic-<i>co</i>-glycolic) Acid Biopolymers for Polymeric Nanoparticle Synthesis
Lignin-Graft-Poly(lactic-<i>co</i>-glycolic) Acid Biopolymers for Polymeric Nanoparticle Synthesis Open
A lignin-graft-poly(lactic-co-glycolic) acid (PLGA) biopolymer was synthesized with two types of lignin (LGN), alkaline lignin (ALGN) and sodium lignosulfonate (SLGN), at different (A/S)LGN/PLGA ratios (1:2, 1:4, and 1:6 w/w). …
View article: Influence of salt on membrane rigidity of neu-tral DOPC vesicles
Influence of salt on membrane rigidity of neu-tral DOPC vesicles Open
Salt is a very common molecule in aqueous environments but the question of whether the interactions of monovalent ions Na^+ and Cl^- ,with the neutral heads of phospholipids are impactful enough to change the membrane rigidity is still a m…
View article: Modeling the dynamics of phospholipids in the fluid phase of liposomes
Modeling the dynamics of phospholipids in the fluid phase of liposomes Open
We present the derivation of a new model to describe neutron spin echo spectroscopy and quasi-elastic neutron scattering data on liposomes.
View article: Reply to “Comment on ‘Dynamics of Phospholipid Membranes beyond Thermal Undulation’”
Reply to “Comment on ‘Dynamics of Phospholipid Membranes beyond Thermal Undulation’” Open
Recently, Granek postulated a connection of the Brochard-Lennon (BL) “red blood cell” mode with the short time relaxation of liposomes observed by neutron spin echo (NSE) spectroscopy. The experimental observations themselves clearly exclu…
View article: Synthesis and characterization of polylactide‐PAMAM “Janus‐type” linear‐dendritic hybrids
Synthesis and characterization of polylactide‐PAMAM “Janus‐type” linear‐dendritic hybrids Open
Herein, we present a facile and comprehensive synthetic methodology for the preparation of polyester‐polyamidoamine (PAMAM) (i.e., polyester: polylactide [PLA] (hydrophobic) and polyamidoamine, PAMAM [hydrophilic]) polymers. A library of P…
View article: Dynamics of liposomes in the fluid phase
Dynamics of liposomes in the fluid phase Open
View article: Modeling of Transient Trapping of Fatty Acid Tails in Phospholipids
Modeling of Transient Trapping of Fatty Acid Tails in Phospholipids Open
We present the derivation of a new model to describe neutron spin echo spectroscopy and quasi-elastic neutron scattering data on liposomes. We compare the new model with existing approaches and benchmark it with experimental data. The anal…
View article: Incorporation of Melittin Enhances Interfacial Fluidity of Bicontinuous Microemulsions
Incorporation of Melittin Enhances Interfacial Fluidity of Bicontinuous Microemulsions Open
The effect of an antimicrobial peptide, melittin, on the long-range collective and local undulation motions of bicontinuous microemulsions (BμEs) was evaluated using dynamic light scattering (DLS) and neutron spin echo (NSE) spectroscopy. …
View article: Direct measurement of topological interactions in polymers under shear using neutron spin echo spectroscopy
Direct measurement of topological interactions in polymers under shear using neutron spin echo spectroscopy Open
View article: Direct Measurement of Topological Interactions In Polymers under Shear Using Neutron Spin Echo Spectroscopy
Direct Measurement of Topological Interactions In Polymers under Shear Using Neutron Spin Echo Spectroscopy Open
We present in-situ neutron spin echo measurements on an entangled polydimethylsiloxane melt under shear and demonstrate the ability to monitor nano-scale dynamics in flowing liquids. We report no changes in the topological interactions of …
View article: Direct Measurement of Topological Interactions In Polymers under Shear Using Neutron Spin Echo Spectroscopy
Direct Measurement of Topological Interactions In Polymers under Shear Using Neutron Spin Echo Spectroscopy Open
We present in-situ neutron spin echo measurements on an entangled polydimethylsiloxane melt under shear and demonstrate the ability to monitor nano-scale dynamics in flowing liquids. We report no changes in the topological interactions of …
View article: Dynamics in the Plastic Crystalline Phases of Cyclohexanol and Cyclooctanol Studied by Quasielastic Neutron Scattering
Dynamics in the Plastic Crystalline Phases of Cyclohexanol and Cyclooctanol Studied by Quasielastic Neutron Scattering Open
Plastic crystals are a promising candidate for solid state ionic conductors. In this work, quasielastic neutron scattering is employed to investigate the center of mass diffusive motions in two types of plastic crystalline cyclic alcohols:…
View article: Dynamics of Phospholipid Membranes beyond Thermal Undulations
Dynamics of Phospholipid Membranes beyond Thermal Undulations Open
Here, we investigated the molecular dynamics of unilamellar liposomes by neutron spin echo spectroscopy. We report the first experimental evidence of a short-range motion at the length scale of the size of the headgroup of a lipid. The ass…
View article: Solution Self-Assemblies of Sequence-Defined Ionic Peptoid Block Copolymers
Solution Self-Assemblies of Sequence-Defined Ionic Peptoid Block Copolymers Open
A series of amphiphilic ionic peptoid block copolymers where the total number (1 or 3) and position of ionic monomers along the polymer chain are precisely controlled have been synthesized by the submonomer method. Upon dissolution in wate…
View article: Entropy Driven Molecular Motion of Semiconducting Polymers in Solution
Entropy Driven Molecular Motion of Semiconducting Polymers in Solution Open