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Two-dimensional Nanosheets by Liquid Metal Exfoliation.
Adv Mater
December 2024
Institute of Materials Research, Center of Double Helix, Guangdong Provincial Key Laboratory of Thermal Management Engineering and Materials, Shenzhen Key Laboratory of Advanced Layered Materials for Value-added Applications, Institute of Materials Research, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, P. R. China.
Liquid exfoliation is a scalable and effective method for synthesizing 2D nanosheets (NSs) but often induces contamination and defects. Here, liquid metal gallium (Ga) is used to exfoliate bulk layered materials into 2D NSs at near room temperature, utilizing the liquid surface tension and Ga intercalation to disrupt Van der Waals (vdW) forces. In addition, the process can transform the 2H-phase of transition metal dichalcogenides into the 1T'-phase under ambient conditions.
View Article and Find Full Text PDFSpontaneous nanosized liposome formation from crude dried lecithin upon addition of glycerol.
Sci Rep
December 2024
School of Engineering, University of Guelph, Guelph, ON, N1G2W1, Canada.
Nanosized liposomal vesicles (NLV) were successfully prepared using natural sunflower lecithin without the use of high-pressure homogenization or filtration. Upon glycerol addition to dispersions of lecithin multilamellar vesicles (MLVs), these broke down spontaneously to liposomes with diameters in the range of 100-200 nm. Static light scattering demonstrated that glycerol addition above 30% (w/w) induced the complete transformation of MLVs into NLVs.
View Article and Find Full Text PDFThe paper presents a thorough investigation into the design of a Modified Core Hexa-Deca Photonic Crystal Fiber (MHD-PCF) with adjustable features to regulate dispersion and birefringence. At the target wavelength of 1550 nm, the suggested MHD-PCF exhibits extraordinary optical properties, including an ultra-high negative dispersion coefficient of - 7755 ps/(nm km) and significant birefringence of 1.905 × 10.
View Article and Find Full Text PDFArticle Synopsis
- Photon-based entanglement sources, essential for creating entangled states, often suffer from quality loss due to birefringence in nonlinear crystals during spontaneous parametric down-conversion.
- The study provides a theoretical analysis of birefringent walk-off and demonstrates that using pre- and post-compensation can improve entangled photon quality.
- Experimental validation shows significant success, achieving a violation of CHSH-Bell's inequality by about 366 standard deviations, making this method applicable to various optical quantum technologies, such as computation, sensing, and communication.
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- * The study reports the first experimental generation of GQKSs from a fiber laser, revealing that their temporal and spectral characteristics are influenced by factors like quadratic dispersion, pump power, and intra-cavity birefringence.
- * Different soliton states, such as harmonic mode-locking and soliton bunches, were observed through careful manipulation of quadratic and quartic dispersion values, helping to deepen understanding of
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