Microwave spectroscopy of individual vortex-state magnetic nanodisks in a perpendicular bias magnetic field H is performed using a magnetic resonance force microscope. It reveals the splitting induced by H on the gyrotropic frequency of the vortex core rotation related to the existence of the two stable polarities of the core. This splitting enables spectroscopic detection of the core polarity....

DOI: 10.1002/aelm.201500070 simulations by Dvornik et al. [ 30 ] Recently, Keatley et al. [ 31 ] used a time-resolved scanning Kerr microscopy to isolate the dynamic dipolar interaction between a pair of nominally-shaped disks. However, a detailed scrutiny of phase-resolved Kerr ellipticity data is required to determine the dynamic dipolar coupling strength versus edge-to-edge spacing/diameter ...

The term nanodisk (ND) describes reconstituted high-density lipoprotein particles that contain one or more exogenous bioactive agents. In the present study, ND were assembled from apolipoprotein A-I, the zwitterionic glycerophospholipid 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC), and the synthetic cationic lipid 1,2-dimyristoyl-3-trimethylammonium-propane (DMTAP). ND formulated at a DMP...

A prototype nanoparticle biosensor based on localized surface plasmon resonance (LSPR) spectroscopy was developed to detect drug binding to human membrane-bound cytochrome P450 3A4 (CYP3A4). CYP3A4 is one of the most important enzymes in drug and xenobiotic metabolism in the human body. Because of the inherent propensity of CYP3A4 to aggregate, it is difficult to study drug binding to this prot...

This paper described cyclic voltammograms (CVs) on a recessed nanodisk-array electrode (RNE) prepared from a track-etched polycarbonate membrane (TEPCM) with 10-nm diameter pores. A RNE was prepared via sputtering of a gold thin film onto a TEPCM whose pores were coated with polyvinylpyrrolidone. CVs of such a RNE changed from peak-shaped to sigmoidal with decreasing scan rate due to the transi...

Plasmonic metasurfaces for color generation are emerging as important components next display devices. Fabricating bright plasmonic colors economically and via easily scalable methods, however, remains difficult. Here, the authors demonstrate an efficient strategy based on colloidal lithography to fabricate silver-based reflective metal–insulator–nanodisk cavities that provide a cyan-magenta-ye...

A plasmonic nanostructure forming a metal-semiconductor interface generates electric potential by optical illumination. Grounded nanostructures can also generate potentials based on the recently demonstrated plasmoelectric effect that allows all metallic photoelectric devices to be fabricated and is capable of generating negative positive at off-resonance merely tuning illumination wavelength. ...

Higher-order topological insulators have attracted great research interest recently. Different from conventional insulators, higher-order do not necessarily require spin-orbit coupling, which makes it possible to realize them in spinless systems. Here, we study phonons 2D graphyne family materials. By using first-principle calculations and topology/symmetry analysis, find that both graphdiyne $...