Interaction of Nano-Clay Platelets with a Phospholipid in Presence of a Fluorescence Probe

Saha, Mitu; Hussain, Syed Arshad; Bhattacharjee, D.

doi:10.1080/15421406.2014.950465

Cited by 3 publications

(5 citation statements)

References 43 publications

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“…Measurement of change in surface pressure as a function of time using the LB technique allows one to have an idea about the surface activities within the Langmuir film. − This process has been extended to study the interactions between phospholipids and other biomembrane components with suitable materials like drugs, , nanoparticles, enzymes, DNA, and cholesterol . In the present case, also the LB technique has been employed to study the interaction between floating DOPC films and water-soluble coagulating protein PS.…”

Section: Resultsmentioning

confidence: 99%

Interaction of a Phospholipid and a Coagulating Protein: Potential Candidate for Bioelectronic Applications

et al. 2022

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In the present communication, we have investigated the interaction between a biomembrane component 1,2-dioleoyl- sn -glycero-3-phosphocholine (DOPC) and a coagulating protein protamine sulfate (PS) using the Langmuir–Blodgett (LB) technique. The π– A isotherm, π– t characteristics, and analysis of isotherm curves suggested that PS strongly interacted with DOPC, affecting the fluidity of the DOPC layer. Electrical characterization indicates that PS as well as the PS–DOPC film showed resistive switching behavior suitable for Write Once Read Many (WORM) memory application. Trap-controlled space charge-limited conduction (SCLC) was the key mechanism behind such observed switching. The presence of DOPC affected the SCLC process, leading to lowering of threshold voltage ( V Th ), which is advantageous in terms of lower power consumption.

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Section: Resultsmentioning

confidence: 99%

Interaction of a Phospholipid and a Coagulating Protein: Potential Candidate for Bioelectronic Applications

et al. 2022

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“…We thus indicate there could be some highly packed Nb molecules formed on the surface of clay sheets. This phase transformation was induced by the compression and the removal of solvents when the Nb was transferred from solutions to the restricted geometry of solid surfaces . The formation of aggregates has been verified by tuning external environments, and the “intramolecular aggregate” was found to be generated by joining oxazine rings with proper linkages. , Therefore, an interchromophore delocalization could occur in the bichronophers or polychronophers when the orientations of Nb are prepared in the hybrid films, and thus a hypsochromic shift both in Abs and PL spectra can be anticipated .…”

Section: Resultsmentioning

confidence: 97%

“…We infer there are two different types of configurations of the Nb molecules when they are immobilized on the clay sheets. The different configurations could result from the variant arrangements of Nb molecules induced by the compression, and most probably some aggregates are formed . We thus name the adsorbed states as adsorbed state type I and II based on the absorption peaks at 505 and 590 nm, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…The different configurations could result from the variant arrangements of Nb molecules induced by the compression, and most probably some aggregates are formed. 5 We thus name the adsorbed states as adsorbed state type I and II based on the absorption peaks at 505 and 590 nm, respectively. For comparison, we also recorded Abs profiles for both clay dispersions that are dissolved with Nb molecules.…”

Section: Resultsmentioning

confidence: 99%

“…The Langmuir–Blodgett (LB) technique is a good means for the construction of monolayers at the air/water (A/W) interface. By this means a film with defined architectures/orientation and a selected phase behavior can be prepared by control of the deposition parameters such as barrier compression, dipping speed, molar composition, and surface pressures. , The amphiphilic dye molecules readily form Langmuir layers at the A/W interface, , but most of the others cannot because of their solubility in the subphase . To get a uniform layer, the previous researchers have adopted opposite charged amphiphilic molecules to construct a preformed Langmuir monolayer, and the water-soluble dye molecules were incorporated in this preformed layer to get a hybrid film.…”

Section: Introductionmentioning

confidence: 99%

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Spectral Inspections on Molecular Configurations of Nile Blue A Adsorbed on the Elementary Clay Sheets

Huang

Liu

et al. 2015

J. Phys. Chem. B

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Studies on the configuration of dye molecules are of great importance in revealing origins of the electronic bands as well as understanding their transitions. In this work, we utilized dye molecules named Nile blue A, which are a type of oxazine dyes, to study the molecular configurations when they are transferred from solutions to a solid surface. The Langmuir-Blodgett (LB) technique was employed to construct such an interface where the interaction between the dye molecules and solid supports can be pursued. Hybrid films were prepared via the LB depositions, and the dye molecules were assembled on the elementary clay sheets (laponite, saponite). The configuration of Nb reflected by the molecular orientation, packing density, phase behavior, and variances of the surface tension has been derived. The ex situ spectroscopy characterizations such as UV-vis absorption, fluorescence emission, and excitation spectra were carried out on these LB films to reveal the fact that the adsorbed Nb molecules are mainly assembled in two types of configurations. Adsorbed state I was found to be achieved at high concentrations (1-10 ppm) of clay dispersions and low surface pressure (∼5 mN/m). In this state the anionic oxazine rings of Nb are adsorbed on clay sheets sharing a large lift-off area. This configuration gives allowable fluorescence (λ = 550 nm). Lower clay concentration (<1 ppm) and high surface pressure (10-30 mN/m) yield the adsorbed state II in which the oxazine chromophores were arranged in a side-by-side style, and the dye molecules stand perpendicularly to the clay sheets. This conformation exhibits no photoluminescence.

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Nanostructured Films: Langmuir–Blodgett (LB) and Layer-by-Layer (LbL) Techniques

2017

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Interaction of Nano-Clay Platelets with a Phospholipid in Presence of a Fluorescence Probe

Cited by 3 publications

References 43 publications

Interaction of a Phospholipid and a Coagulating Protein: Potential Candidate for Bioelectronic Applications

Interaction of a Phospholipid and a Coagulating Protein: Potential Candidate for Bioelectronic Applications

Spectral Inspections on Molecular Configurations of Nile Blue A Adsorbed on the Elementary Clay Sheets

Nanostructured Films: Langmuir–Blodgett (LB) and Layer-by-Layer (LbL) Techniques

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