인공고관절의 세라믹 볼 헤드의 기계적 안정성 평가를 위한 3 차원 유한요소 해석

Capillarity and Wetting Phenomena: Drops, Bubbles, Pearls, Waves

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Design Of Analog Cmos Integrated Circuits

Understanding how light interacts with matter at the nanometre scale is a fundamental issue in optoelectronics and nanophotonics. In particular, many applications (such as bio-sensing, cancer therapy and all-optical signal processing) rely on surface-bound optical excitations in metallic nanoparticles. However, so far no experimental technique has been capable of imaging localized optical excitations with sufficient resolution to reveal their dramatic spatial variation over one single nanoparticle. Here, we present a novel method applied on silver nanotriangles, achieving such resolution by recording maps of plasmons in the near-infrared/visible/ultraviolet domain using electron beams instead of photons. This method relies on the detection of plasmons as resonance peaks in the energy-loss spectra of subnanometre electron beams rastered on nanoparticles of well-defined geometrical parameters. This represents a significant improvement in the spatial resolution with which plasmonic modes can be imaged, and provides a powerful tool in the development of nanometre-level optics.

Mapping surface plasmons on a single metallic nanoparticle

A taxonomy of line balancing problems and their solutionapproaches

Graphene-based field effect transistor biosensors for breast cancer detection: A review on biosensing strategies

Optical properties of the Au-SiO2-Au nanobelt structure with quasiperiodicity along x-axis and fixed Au height, width and different spacer (dielectric) heights were numerically investigated for sensing application of liquids with refractive indices close to the water. Although both propagated surface plasmon mode and localized surface plasmon mode were recorded in the single-layer Au and Au-SiO2-Au nanobelt structure, only the localized surface plasmon mode was recorded in the Au-SiO2 nanobelt structure. The effects of increasing the dielectric layer (between two Au nanobelts) height on the extinction spectrum were observed as blue shift of whole extinction spectrum. It was found that the localized surface plasmon mode shift was negligible while the propagated surface plasmon mode was significantly shifted towards smaller wavelength. The minimum resonance linewidth was calculated as 42 nm at refractive index of 1.377, which is much smaller than that in the single-layer Au and Au-SiO2 nanobelt structures.

/pdf/optical-properties-and-liquid-sensitivity-of-au-sio2-au-1kn735eb0u.pdf

Optical Properties and Liquid Sensitivity of Au-SiO2-Au Nanobelt Structure

This study introduces a new hybrid design for a specific case of assembly lines, and proposes a multi-pass random assignment algorithm to find the minimum number of stations required. The algorithm also finds the sequence and the schedule of the tasks assigned. The new design is a combination of two-sided lines and U-shaped lines, which benefits from the advantages of both designs at the same time. One side of the line is arranged in U-shape allowing stations with crossovers, and the other side of the line is balanced like a traditional straight flow. Depending on product direction, either Left or Right side of the line can be designed in U-shape. Small and large-sized two-sided assembly line test-bed problems were solved using the algorithm. Optimal results are achieved for all small-sized problems. Due to the novelty of the design, results of largesized problems are compared to findings of studies on simple two-sided balancing. Algorithm produced better results in most of the cases.

A new algorithm for u-shaped two-sided assembly line balancing

Localized Surface Plasmon Resonance (LSPR) sensors have potential applications in essential and important areas such as bio-sensor technology, especially in medical applications and gas sensors in environmental monitoring applications. Figure of Merit (FOM) and Sensitivity (S) measurements are two ways to assess the performance of an LSPR sensor. However, LSPR sensors suffer low FOM compared to the conventional Surface Plasmon Resonance (SPR) sensor due to high losses resulting from radiative damping of LSPs waves. Different methodologies have been utilized to enhance the performance of LSPR sensors, including various geometrical and material parameters, plasmonic wave coupling from different structures, and integration of noble metals with graphene, which is the focus of this report. Recent studies of metal-graphene hybrid plasmonic systems have shown its capability of promoting the performance of the LSPR sensor to a level that enhances its chance for commercialization. In this review, fundamental physics, the operation principle, and performance assessment of the LSPR sensor are presented followed by a discussion of plasmonic materials and a summary of methods used to optimize the sensor’s performance. A focused review on metal-graphene hybrid nanostructure and a discussion of its role in promoting the performance of the LSPR sensor follow.

https://www.mdpi.com/1424-8220/19/4/862/pdf

A Short Review on the Role of the Metal-Graphene Hybrid Nanostructure in Promoting the Localized Surface Plasmon Resonance Sensor Performance.

Magnetic levitation of miniaturized objects is investigated in this paper. A magnetic levitation setup is built to implement one-dimensional magnetic levitation motion. It was observed that as the levitated object becomes smaller, magnetic levitation suffers more from undesired vibrations. As a solution, eddy current damping is offered and implemented successfully by placing conductive plates close to the levitated object. An analytical expression for damping coefficient is derived. Experimentally, it is shown that eddy current damping can reduce the RMS positioning error to the level of more than one third of its original value for a 0.386 g object levitated in an air-gap region of 290 mm. The proposed system has the potential to be used for micro-manipulation purposes in a high motion range of 39.8 mm.

/pdf/eddy-current-damping-for-magnetic-levitation-downscaling-3k3geohhrp.pdf

Mustafa Yavuz

Papers

Graphene-based field effect transistor biosensors for breast cancer detection: A review on biosensing strategies

Optical Properties and Liquid Sensitivity of Au-SiO2-Au Nanobelt Structure

A new algorithm for u-shaped two-sided assembly line balancing

A Short Review on the Role of the Metal-Graphene Hybrid Nanostructure in Promoting the Localized Surface Plasmon Resonance Sensor Performance.

Eddy current damping for magnetic levitation: downscaling from macro- to micro-levitation