Lehman J.H.,U.S. National Institute of Standards and Technology |
Lee B.,Scientech |
Grossman E.N.,U.S. National Institute of Standards and Technology
Applied Optics | Year: 2011
We present a description of a 1.5mm long, vertically aligned carbon nanotube array (VANTA) on a thermopile and separately on a pyroelectric detector. Three VANTA samples, having average lengths of 40 μm, 150 μm, and 1.5mm were evaluated with respect to reflectance at a laser wavelength of 394 μm (760 GHz), and we found that the reflectance decreases substantially with increasing tube length, ranging from 0.38 to 0.23 to 0.01, respectively. The responsivity of the thermopile by electrical heating (98.4mA=W) was equal to that by optical heating (98.0mA=W) within the uncertainty of the measurement. We analyzed the frequency response and temporal response and found a thermal decay period of 500 ms, which is consistent with the specific heat of comparable VANTAs in the literature. The extremely low (0.01) reflectance of the 1.5mm VANTAs and the fact that the array is readily transferable to the detector's surface is, to our knowledge, unprecedented. © 2011 Optical Society of America. Source
Scientech | Date: 2013-04-08
A non-contact substrate chuck applies to sucking a substrate and comprises a first plate-like element, a second plate-like element paralleled the first plate-like element and a sucking element, wherein through holes of the first plate-like element and the second plate-like element jointly form a channel where the sucking element is accommodated. The chuck lets gas flow through a gas inlet of the sucking element toward the substrate to form a gap between an active surface of the substrate and a first surface of the first plate-like element. At least one side of the substrate is positioned by positioning protrusions of the first plate-like element. A least possible number of supporting points are used and arranged around the sides of the substrate without touching the substrate surface to prevent the substrate surface from being damaged. The present invention also discloses a vertical-type substrate supporting apparatus using the abovementioned chuck.
Scientech | Date: 2014-07-14
EQUIPMENT AND CATALYSTS USED TO MANUFACTURE CHEMICAL PRODUCTS FROM ETHANOL. EQUIPMENT AND CATALYSTS USED TO MANUFACTURE CHEMICAL PRODUCTS FROM ETHANOL.
Scientech | Date: 2014-07-12
Scientech | Date: 2015-05-06
A curved battery includes an arc protection member and a battery unit. The battery unit is disposed in the arc protection member and has a shape corresponding to the arc protection member. The battery unit includes a first electrode layer, a second electrode layer, a conductive material, a first conductive handle and a second conductive handle. The battery unit is winded from one end away from the first conductive handle and the second conductive handle towards directions of the first conductive handle and the second conductive handle. The first conductive handle and the second conductive handle point to directions perpendicular to an axial direction of the battery unit and extend out of the arc protection member via two openings of the arc protection member. Thus, the curved battery is allowed with a large curvature that is less likely to cause damages of the battery unit.