Swimming, i.e., being able to advance in the absence of external forces by performing cyclic shape changes, is particularly demanding at low Reynolds numbers. This is the regime of interest for microorganisms and microor nano-robots. We focus in this paper on a simple yet representative example: the three-sphere swimmer of Najafi and Golestanian [16]. For this system, we show how to cast the pr...

Corresponding author: Yuehuei H. An, MD, Department of Orthopaedic Surgery, Medical University of South Carolina, 96 Jonathan Lucas St, Suite 708, Charleston, SC 29425. Tel: (843) 792-8169; Fax: (843) 792-3674; [email protected] Figure 1. Scanning electron micrographs (SEM) of PLLA and nano apatite-PLLA scaffold surfaces prepared using sugar sphere leaching method. (A) PLLA scaffold; (B) Nano apatit...

We experimentally engineer Nanojets produced by dielectric spheres by varying the illumination and observe the effect with a high-resolution interference microscope (HRIM). Converging and diverging spherical wavefronts and BesselGauss beams are considered. We find that the diverging wavefront pushes Nanojets away from the surface of the sphere without change of the spot size. This allows earnin...

Bionanoscience/technology sits at the interface of chemistry, biology, physics, materials science, engineering and medicine and involves the exploitation of biomaterials, devices or methodologies on the nanoscale. One sub-field of bionanoscience/technology is concerned with the exploitation of biomaterials in the fabrication of new nano-materials and/or -devices. In this Perspective we describe...

Three-dimensional reciprocal-space maps of a single SiGe island around the Si(004) Bragg peak are recorded using an energy-tuning technique with a microfocused X-ray beam with compound refractive lenses as focusing optics. The map is in agreement with simulated data as well as with a map recorded by an ordinary rocking-curve scan. The energy-tuning approach circumvents both the comparatively la...

Alumina is one of the most widely used ceramic materials as catalysts, catalyst supports and absorbents, and also wear resistant coating. This study focused on fabricating and characterizing of alumina ceramic nanoparticles fabricated using new and simple sol-gel method. Aluminium oxide (Al2O3) nanoparticles were synthesized by iron (III) nitrate 9-hydrate as precursor. Physicochemical properti...