Wetting, indicating the ability of a liquid to spread out over solid surfaces,is of vital importance in addressing the scientific issues related to energy and environment technologies. The study of wetting encompasses...
Wetting, indicating the ability of a liquid to spread out over solid surfaces,is of vital importance in addressing the scientific issues related to energy and environment technologies. The study of wetting encompasses the academic disciplines of surface chemistry, nanotechnology, materialsscience and energy *** past several decades have witnessed significant progress in achieving desirable wetting performance with water,
We successfully fabricated silicon-on-insulator (SOI) photonic crystal (PhC) slabs in which electromagnetic topological band gaps and edge modes were materialized for symmetric transverse-electric-like modes. Because ...
详细信息
We successfully fabricated silicon-on-insulator (SOI) photonic crystal (PhC) slabs in which electromagnetic topological band gaps and edge modes were materialized for symmetric transverse-electric-like modes. Because the structure of our specimens can be regarded as symmetric about the horizontal middle plane of the PhC slab, their symmetric and antisymmetric eigenmodes were rigorously separated, so we could achieve genuine photonic band gaps for the former. We fabricated those specimens by electron beam lithography of the top Si layer of SOI wafers and successive plasma-enhanced chemical vapor deposition of a SiO2 capping layer. We confirmed the complete common band gap of topologically trivial and nontrivial PhCs and the topological edge modes on the boundary between them by angle-resolved reflection spectroscopy in the mid-infrared range. This is an observation of the common band gap and edge modes that materialized in symmetric PhC slabs without a membrane structure, that is, without the etching of a sacrificial layer under the PhC to increase the refractive-index contrast and the width of the common band gap.
Lipid-coated microbubbles are widely used as an ultrasound contrast agent,as well as drug delivery ***,the two main limitations in ultrasound diagnosis and drug delivery using microbubbles are the short half-life in t...
详细信息
Lipid-coated microbubbles are widely used as an ultrasound contrast agent,as well as drug delivery ***,the two main limitations in ultrasound diagnosis and drug delivery using microbubbles are the short half-life in the blood system,and the difficulty of surface modification of microbubbles for active *** exosome,a type of extracellular vesicle,has a preferentially targeting ability for its original *** this study,exosome-fused microbubbles(Exo-MBs)were developed by embedding the exosome membrane proteins into *** a result,the stability of Exo-MBs is improved over the conventional *** the same principle that under the exposure of ultrasound,microbubbles are cavitated and self-assembled into nano-sized particles,and Exo-MBs are self-assembled into exosome membrane proteins-embedded nanoparticles(Exo-NPs).The Exo-NPs showed favorable targeting properties to their original cells.A photosensitizer,chlorin e6,was loaded into Exo-MBs to evaluate therapeutic efficacy as a drug *** higher therapeutic efficacy of photodynamic therapy was confirmed,followed by cancer immunotherapy from immunogenic cell *** have therefore developed a novel ultrasound image-guided drug delivery platform that overcomes the shortcomings of the conventional ultrasound contrast agent and is capable of simultaneous photodynamic therapy and cancer immunotherapy.
LoRa's biggest advantage is its flexibility, which is the ability to increase or decrease data rate and range while decreasing or increasing sensitivity. Whenever propagation conditions change frequently, this fun...
详细信息
In advanced electronic packaging, the stability of intermetallic compounds (IMCs) under high electric current density is crucial for the reliability of solder joints. Cu6Sn5, a predominant IMC formed between Sn-based ...
详细信息
The cell, as the most fundamental unit of life, is a microcosm of biology in which the confluence of nearly all aspects of classical physics (mechanics, statistical physics, condensed matter, and electromagnetism) pla...
详细信息
The cell, as the most fundamental unit of life, is a microcosm of biology in which the confluence of nearly all aspects of classical physics (mechanics, statistical physics, condensed matter, and electromagnetism) plays out. This leads to a rich and complex emergent behavior that determines the entire gamut of biological functions. Specifically, at the cellular scale, mechanical forces and deformations are inextricably linked to electrical fields (and, to a lesser degree, magnetic fields). This in turn is responsible for phenomenology such as cell-cell communication, morphological evolution, cell fusion, self-assembly, cell fission, magnetoreception, endocytosis, and adhesion, among others. From the viewpoint of biomedicine, cellular response to the combined influence of electrical, magnetic, and mechanical fields has applications in cancer treatment, targeted transfer of medicine, gene therapy, and wound amelioration. As an example of the profound influence of the combined electrical-mechanical coupling, one needs to take cognizance only of the operation of ion channels that form the basis for our sensing system (such as hearing, sight, and tactile sense). The coupled mechanical and electromagnetic behavior of a cell is a highly interdisciplinary endeavor and this review provides a distillation of both the theoretical underpinnings of the subject and the pertinent biological interpretation. The key developments pertaining to this topic are reviewed, a unified mathematical framework that couples nonlinear deformation and electromagnetic behavior as germane for soft biological entities is summarized, gaps in current knowledge are pointed out, and the central issues that are pertinent to future research are commented upon.
We report the magneto-optic Kerr effect (MOKE) angle of Au magnetically excited by spin accumulation. We perform time-resolved polar MOKE measurements on Au/Co heterostructures. In our experiment, the ultrafast optica...
详细信息
We report the magneto-optic Kerr effect (MOKE) angle of Au magnetically excited by spin accumulation. We perform time-resolved polar MOKE measurements on Au/Co heterostructures. In our experiment, the ultrafast optical excitation of the Co drives spin accumulation into an adjacent Au layer. The spin accumulation, together with spin-orbit coupling, leads to nonzero terms in the off-diagonal conductivity tensor of Au, which we measure by recording the polarization and ellipticity of light reflected from the Au surface for photon energies between 1.3 and 3.1 eV. In a narrow energy range near the interband transition threshold of Au, the sensitivity to magnetization measured exceeds 1μradperA/m. In the photon energy interval of 0.6–4.4 eV, the maximum value for transition ferromagnetic metals like Ni are <10nradperA/m, while predicted values for heavy metals like Pt or W are <13nradperA/m. The exceptional sensitivity of the optical properties of Au to spin magnetic moments make Au an exceptionally sensitive optical magnetometer, with potential applications in the development of optospintronic technologies.
Band topology of anomalous quantum Hall insulators can be precisely addressed by computing the Chern numbers of constituent nondegenerate bands, describing the presence of quantized, Abelian Berry flux through the two...
详细信息
Band topology of anomalous quantum Hall insulators can be precisely addressed by computing the Chern numbers of constituent nondegenerate bands, describing the presence of quantized, Abelian Berry flux through the two-dimensional Brillouin zone. Can Berry flux be captured for the SU(2) Berry connection of two-fold degenerate bands in spinful materials preserving space-inversion (P) and time-reversal (T) symmetries without detailed knowledge of underlying basis? We address this question by investigating the correspondence between a non-Abelian generalization of Stokes' theorem and the manifestly gauge-invariant eigenvalues of Wilson loops computed along in-plane contours which preserve the underlying crystalline symmetry. The importance of this correspondence is elucidated by performing natural number resolved classification of ab initio band structures of three-dimensional, Dirac materials. Our work underscores how identification of quantized Berry flux, both Abelian and non-Abelian, offers a unified framework for addressing first-order and higher-order topology of insulators and semimetals.
In this article, we utilized electroplating method forming Cu/Ni/Ga structure. Interfacial reaction was investigated with different ratio of Ni: Ga 7:3 and 1:20. The result showed that Ga reacted with the substrates i...
详细信息
CONSPECTUS:Nanofabrication is one of the core techniques in rapidly evolving nanoscience and *** top-down nanofabrication approaches such as photolithography and electron beam lithography can produce high-resolution n...
详细信息
CONSPECTUS:Nanofabrication is one of the core techniques in rapidly evolving nanoscience and *** top-down nanofabrication approaches such as photolithography and electron beam lithography can produce high-resolution nanostructures in a robust ***,these methods usually involve multistep processing and sophisticated instruments and have difficulty in fabricating three-dimensional complex structures of multiple materials and ***,bottom-up techniques have emerged as promising alternatives to fabricating nanostructures via the assembly of individual building *** comparison to top-down lithographical methods,bottom-up assembly features the on-demand construction of superstructures with controllable configurations at single-particle *** size,shape,and composition of chemically synthesized building blocks can also be precisely tailored down to the atomic scale to fabricate multimaterial architectural structures of high *** techniques have been reported to assemble individual nanoparticles into complex structures,such as self-assembly,DNA nanotechnology,patchy colloids,and optically controlled *** them,the optically controlled assembly has the advantages of remote control,site-specific manipulation of single components,applicability to a wide range of building blocks,and arbitrary configurations of the assembled *** this Account,we provide a concise review of our contributions to the optical assembly of architectural materials and structures using discrete nanoparticles as the building *** exploiting entropically favorable optothermal conversion and controlling optothermal−matter interactions,we have developed optothermal assembly techniques to manipulate and assemble individual *** techniques can be operated both in solution and on solid ***,we discuss the opto-thermoelectric assembly(OTA)of colloidal particles into superstructures by co
暂无评论