The Purcell effect of a nanoshell dimer on the fluorescence single molecule placed within dimer's gap is studied. numerical results show that acts as an antenna, making energy transfer from excited to more efficient, and lowpass filter for radiation far field. Moreover, enhancement factor much higher than solid Au in longer-wavelength regime.

The long-term toxicity effects of gold nanoparticles (GNPs) on the proliferation and differentiation a progenitor cell line, MG63 osteoblast-like cells, was investigated. These cells were treated for 20 hours with two media that contained 10 nm GNPs at concentrations 1 ppm ppm. mitosis GNP-treated observed after least 21 using dark-field fluorescence microscopy. TEM, LSCM hyperspectral images indicated late endosomes in aggregated caused by vesicle fusion. Subsequently, days being cultured...

The specific properties of gold nanoparticles (AuNPs) make them a novel class photothermal agents that can induce cancer cell damage and even death through the conversion optical energy to thermal energy. Most relevant studies have focused on increasing precision targeting, improving efficacy transfer, exploring additional functions. Nevertheless, most cells uptake nanosized particles nonspecific endocytosis; therefore, before hyperthermia via AuNPs be applied for clinical use, it is...

Combining the scattered light of gold nanoparticles (GNPs) and fluorescence dye molecules, a compound cellular imaging laser scanning confocal microscopy (LSCM) is obtained. The human breast cancer cell line (MDA-MB-435S, BCRC 60429) used for experiment. These cells are incubated with glucose medium containing GNPs 26 hours, then stained by Prodium Iodide (PI) their nuclei. By using single to illuminate these adjusting ranges two bandpass filters detection, from PI can be induced...

This study theoretically investigates the wavelength-dependent longitudinal polarizability of a gold nanorod (GNR) irradiated by polarized laser beam. The resultant optical torque in terms Maxwell stress tensor was analyzed quantitatively using multiple multipole method. Our results indicate that real part GNR can be either positive or negative, leading to parallel perpendicular modes, respectively. For and long axis is rotated align perpendicular, respectively, polarization direction...

This study investigates the radiobiological effects of gold nanoparticles (GNPs) as radiosensitizers for proton beam therapy (PBT). Specifically, we explore enhanced production reactive oxygen species (ROS) in GNP-loaded tumor cells irradiated by a 230 MeV spread-out Bragg peak (SOBP) zone obtained passive scattering system. Our findings indicate that radiosensitization enhancement factor is 1.24 at 30% cell survival fraction, 8 days after 6 Gy irradiation. Since protons deposit majority...

In this study, we demonstrate that the uptake rate of surface-modified gold nanoparticles (GNPs) with folic acid by specific cells can be increased significantly, if membranes these have sufficient folic-acid receptors. Two human breast cancer cell lines were studied; one is MDA-MB-435S cell, and other T-47D cell. The expression receptors former much higher than latter. These incubated media containing bare GNPs or conjugated individually. Due to unique optical behavior (i.e. surface plasmon...

The wavelength-dependent optical torques provided by a circularly polarized (CP) plane wave driving Au nanorod (NR) and nanowire (NW) to rotate constantly were studied theoretically. Using the multiple multipole method, resultant torque in terms of Maxwell's stress tensor was analyzed. Numerical results show that spectrum is accordance with absorption NR/NW. Under same fluence, maximum occurs at longitudinal surface plasmon resonance (LSPR) NR/NW, accompanied severe plasmonic heating....

A real-time muscle fatigue monitoring system was developed to quantitatively detect the of subjects during cycling movement, where a progression measure (FPM) built-in. During electromyogram (EMG) signals vastus lateralis and gastrocnemius muscles in one leg as well speed are synchronously measured fashion. In addition, heart rate (HR) Borg rating perceived exertion scale value recorded per minute. Using EMG signals, electrical activity median frequency (MF) calculated cycle. Moreover,...

Radiotherapy is an important modality for the treatment of cancer, e.g., X-ray, Cs-137 γ-ray (peak energy: 662 keV). An therapy pathway radiation to generate double strand breaks DNA prohibit proliferation cancer cells. In addition, excessive amount reactive oxygen species (ROS) induced damage organelles, which can cause cellular apoptosis or necrosis. Gold nanoparticles (GNPs) have been proven potential as a radiosensitizer due high biocompatibility, low cytotoxicity and high-Z property (Z...

The dispersion relations of surface plasmon wave (SPW) propagating along a convex or concave metal-dielectric interface with radius curvature are studied by solving the root characteristic equation in terms Bessel and Hankel functions complex order numerically. For geometry, metallic circular cylinder embedded dielectric host is modeled, whereas for one, modeled. We found that phase velocity SPW always less than planar one. On contrary, case faster both cases, attenuation constants larger...

This study theoretically investigates Fano resonances and dips of an Au-SiO2-Au nanomatryoshka that is excited by a nearby electric dipole. An analytical solution dyadic Green's functions used to analyze the radiative nonradiative power spectra radial dipole in proximity nanomatryoshka. From these spectra, plasmon modes accompany are identified. In addition, scattering absorption illuminated plane wave investigated confirm dips. Our results reveal dip splits each quadrupole into bonding...

Gait disorders are a fundamental challenge in Parkinson's disease (PD). The use of laser-light visual cues emitted from shoes has demonstrated effective improving freezing gait within less restrictive environments. However, the effectiveness shoes-based cueing may vary among individuals with PD who have different types impairments. We introduced an innovative system capable producing alternating for left and right feet through one-side at time, while simultaneously recording foot inertial...

In this study, a composite silver nanostructure is presented to serve as the platform for highly efficient plasmon-enhanced fluorescence (PEF). The realized by first employing nanosphere lithography (NPL) combined with reactive ion etching (RIE) technology create nanopyramid array, which then further modified nanoparticles. Utilizing DCJTB fluorophore, found outperform use of either nanoparticles or array. Notably, it not only enhances photoluminescence (PL) but also reduces carrier...

A 2-D metallic bowtie nanoantenna, consisting of two nearby nanotriangles and containing a molecule within the gap, is studied for enhancement single emitter's spontaneous emission. For simplicity, transverse-magnetic model used simulation set new surface integral equations developed calculation. The process emission simply divided into stages: first stage excitation emitter irradiated by an incident plane wave second excited emitter. latter, modeled as electric dipole to interact with...