Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
Cholesterol plays an essential role in regulating the functionality of biomembranes. This study employed in situ second-harmonic generation (SHG) to investigate the adsorption behavior of the dye molecule 4-(4-(diethylamino)styryl)--methyl-pyridinium iodide (D289) on a biomimic membrane composed of 1,2-dipalmitoyl--glycero-3-phospho-(1'-rac-glycerol) (sodium salt) (DPPG) and cholesterol. The time-dependent polarization SHG intensity exhibited an initial rapid increase, followed by a subsequent decline. The initial increased SHG intensity is responsible for the electrostatic interaction-driven adsorption of D289 onto the membrane, while the decrease in the SHG signal results from the broadening of the orientation distribution within the membrane. Heterodyne-detected SHG (HD-SHG) measurements demonstrated that the adsorption of dye molecules influenced the phase of the induced electric field. The interfacial potential Φ(0) as a function of time was measured, and we found that even after reaching a stable Stern layer state, the diffusion layer continued to exhibit a dynamic change. This study offers a comprehensive understanding of the influence of cholesterol on adsorption, reorientation dynamics, and dynamic changes in the reorientation of water in the diffusion layer.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acs.jpcb.3c07130 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
BaAlBO: a beryllium-free member of the SrBeBO family with a [BAlO] double-layered structure.
Chem Sci
September 2025
State Key Laboratory of Crystal Materials, Tianjin Key Laboratory of Functional Crystal Materials, Institute of Functional Crystals, Tianjin University of Technology Tianjin 300384 China
Nonlinear optical (NLO) crystals capable of expanding the spectral region of solid-state are of great importance for many high-tech applications, yet their rational structure design remains a great challenge because of the conflicting property requirements among second harmonic generation (SHG) response, ultraviolet (UV) cut-off edge, and birefringence. Herein, based on the chemical disubstitution of the classic NLO crystal SrBeBO (SBBO), , substituting [BO] triangles with larger π-conjugated [BO] groups and substituting high-toxic [BeO] tetrahedra with environment-friendly [AlO] tetrahedra, a new high-performance aluminoborate NLO crystal, BaAlBO, has been successfully designed and synthesized. The theoretical calculations and optical property measurements indicate that BaAlBO exhibits not only the largest SHG response among the reported aluminoborates (2.
View Article and Find Full Text PDFDirect Deep-UV Second-Harmonic Generation in Disordered Χ-Modulated Ferroelectric Crystals.
Adv Mater
September 2025
Research Center for Crystal Materials, CAS Key Laboratory of Functional Materials and Devices for Special Environmental Conditions, Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Urumqi, 830011, P. R. China.
The generation of coherent deep-ultraviolet (DUV) radiation via nonlinear frequency conversion remains a major scientific and technological challenge in modern optics. To date, only a very limited number of nonlinear optical (NLO) crystals-such as KBBF, ABF, and quartz-have been experimentally demonstrated to support measurable direct second-harmonic generation (SHG) at wavelengths of 177 nm or shorter. There is a pressing need to develop alternative materials or strategies that enable efficient frequency conversion in the DUV region.
View Article and Find Full Text PDFTracking phase transitions of tactoids in sulfated cellulose nanocrystals using second harmonic generation microscopy.
Carbohydr Polym
November 2025
Molecular Imaging and Photonics, Department of Chemistry, KU Leuven, Campus Kulak Kortrijk, Etienne Sabbelaan 53, 8500 Kortrijk, Belgium. Electronic address:
Cellulose nanocrystals (CNCs) have emerged as promising candidates for chiroptical functional materials due to their ability to form cholesteric liquid crystals with tunable periodicity. The quality of the final cholesteric phase is influenced by the nucleation, growth and coalescence mechanism of the initial droplets, known as tactoids. Current research focuses on understanding the size and morphological transformations of these tactoids, to gain deeper insights into their dynamic behavior and, in turn, to better control the final properties of novel photonic materials.
View Article and Find Full Text PDFUltrafast all-optical switching in nonlinear 3R-MoS van der Waals metasurfaces.
Npj Nanophoton
September 2025
Chair in Hybrid Nanosystems, Nanoinstitute Munich, Faculty of Physics, Ludwig-Maximilians-Universität München, Munich, Germany.
Second-order nonlinear optical processes are fundamental to photonics, spectroscopy, and information technologies, with material platforms playing a pivotal role in advancing these applications. Here, we demonstrate the exceptional nonlinear optical properties of the van der Waals crystal 3R-MoS, a rhombohedral polymorph exhibiting high second-order optical susceptibility ( ) and remarkable second-harmonic generation (SHG) capabilities. By designing high quality factor resonances in 3R-MoS metasurfaces supporting quasi-bound states in the continuum (qBIC), we first demonstrate SHG efficiency enhancement exceeding 10.
View Article and Find Full Text PDFShape Memory Collagen Scaffolds Sustain Large-Scale Cyclic Loading.
ACS Mater Lett
September 2025
Preventive and Restorative Dentistry, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States.
Natural biopolymer hydrogels often suffer from relatively low moduli and an inability to maintain structure and mechanics under cyclic loading, limiting their utility in dynamic mechanical environments. Here, a cross-linked collagen cryogel scaffold was fabricated by precompression to densify the network. Following lyophilization, the porous scaffolds sustained >90% axial compressive strain with 200 cycles.
View Article and Find Full Text PDF