Microbeams have undergone a renaissance since their introduction and early use in the mid 60s. Recent advances in imaging, software and beam delivery have allowed rapid technological developments in microbeams for use in a range of experimental studies. The resurgence in the use of microbeams since the mid 90s has coincided with major changes in our understanding of how radiation interacts with...

We analyze the hydrodynamic coupling between long, slender micromechanical beams !microbeams" deployed in an array and oscillating in a viscous, incompressible fluid. The unsteady Stokes equations are solved using a boundary integral technique in a two-dimensional plane containing the microbeam cross sections. The oscillations of nearest neighbor and the next neighbor microbeams couple hydrodyn...

This chapter reviews the optics of pulsed laser microbeams and the use of basic instrumentation to provide pulsed laser microbeam capabilities within a microscope platform. Moreover, we review the principal mechanisms by which laser microbeams produce microsurgical effects in cellular targets. We discuss the principal photothermal, photomechanical, and photochemical damage mechanisms as well as...

We present in this paper a novel tactile fingerprint sensor composed by a single row of microbeams realized by the way of front side bulk micromachining from a standard CMOS circuit. When the user passes his finger on the sensor, the ridges and the valleys that compose the fingerprint induce deflections in the different microbeams. Using a piezoresistive gauge placed at their base, the deflecti...

In this paper we will discuss the technical issues related to creating microbeams of heavy ions (e.g. iron) at energies higher than at existing microbeam facilities (up to 3 GeV/nucleon) and related to developing an electronic position sensitive detector for heavy ions with a position resolution better than 1 micrometer. The experimental requirements define microbeams to be beams which will hav...

A new technique for characterizing end-supported microbeams of coating materials is presented. Microbeams are fabricated using micro-EDM machining to isolate the material under investigation from the underlying substrate. Threeand four-point bending is realized by a custom-built microspecimen testing system, and digital image correlation is employed to capture full-field strains and displacemen...

We present modeling and analysis for the static behavior and collapse instabilities of doublyclamped and cantilever microbeams subjected to capillary forces. These forces can be as a result of a volume of liquid trapped underneath the microbeam during the rinsing and drying process in fabrication. The model considers the microbeam as a continuous medium, the capillary force as a nonlinear funct...

in previous researches, mechanical behavior of a microgripper with homogenous and the same material has been studied. in this paper considering the desired characteristics of fgms, as a good thermal and wear resistance, the mechanical behavior of fgm microgripper under dc voltage and temperature variations is investigated. it is assumed that the two microbeams of the fgm microgripper are mounte...

Single-cell microbeam irradiators are of increasing interest to the biological community. The 5th International Workshop on Microbeam Probes of Cellular Radiation Response, which took place in Stresa, Italy, in May 2001, was attended by about 120 registrants, roughly evenly divided between physicists and biologists. Many new microbeam devices are now under development, and there has been a sign...

Photostress has to be considered during optical micromanipulation of gametes. Ultraviolet light, including low-energy UVA (32-400 nm) radiation, as well as high-intensity near infrared (NIR) laser radiation may induce cell damage. A total number of 580 light-exposed sperm cells were studied in single-cell photostress experiments. Low-power (1.5 mW, 5.3 W/cm2) UVA exposure with 365 nm radiation ...