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    • 2. 发明申请
    • CHEMICALLY SWITCHABLE ULTRAVIOLET PHOTOLUMINESCENCE
    • 化学开关超紫外光致发光
    • WO2015148367A1
    • 2015-10-01
    • PCT/US2015/021983
    • 2015-03-23
    • DREXEL UNIVERSITYTHE TRUSTEES OF THE UNIVERSITY OF PENNSYLVANIA
    • SPANIER, Jonathan, E.GU, ZongquanISLAM, Mohammad, A.SALDANA-GRECO, DiomedesRAPPE, Andrew, Marshall
    • G01N21/00
    • G01N21/75G01N21/6489G01N2021/7786
    • The present disclosure pertains to the use of intense, narrow-linewidth surface, chemically-switchable ultraviolet photoluminescence from radiative recombination of the two-dimensional electron liquid with photo-excited holes in complex oxide heterostructures, such as LaAlO 3 /SrTiO 3 (LAO/STO). Such photoluminescence from the interface between the upper and lower layers can be suppressed and restored reversibly under oxidizing and reducing conditions, respectively, as induced by chemisorption and reversal of chemisorption on the exposed surface of the heterostructure's upper member. Making use of this chemically-switchable ultraviolet photoluminescence, the present disclosure provides, inter alia , systems for detection of a chemical species, methods for determining the absence or presence of a chemical species in a sample, optoelectronic devices, and methods for producing optoelectronic devices.
    • 本公开涉及使用强的窄线宽表面,来自二维电子液体的辐射复合的化学可切换的紫外光致发光与复合氧化物异质结构(如LaAlO 3 / SrTiO 3(LAO / STO))中的光激发空穴的使用, 。 在氧化和还原条件下,分别在上,下层之间界面处的这种光致发光可以被抑制和可逆地恢复,这是由化学吸附引起的,并且异质结构的上部成员的暴露表面上的化学吸附反转。 利用该化学可切换的紫外光致发光,本公开尤其提供了用于检测化学物质的系统,用于确定样品中化学物质的存在或不存在的方法,光电子器件以及用于制造光电器件的方法 。
    • 10. 发明申请
    • WIDE BAND RECONFIGURABLE PLANAR ANTENNA WITH OMNIDIRECTIONAL AND DIRECTIONAL PATTERNS
    • 宽带可重构平面天线,具有网络和方向图案
    • WO2014143320A2
    • 2014-09-18
    • PCT/US2013/076816
    • 2013-12-20
    • DREXEL UNIVERSITYADANT TECHNOLOGIES, INC.
    • PATRON, DamianoDANDEKAR, Kapil, R.PIAZZA, Daniele
    • H01Q3/26
    • H01Q3/24H01Q1/38H01Q3/44H01Q9/44H01Q21/205H01Q21/30
    • A planar reconfigurable antenna that is capable of generating omnidirectional and directional radiation patterns over a wide frequency band or over multiple frequency bands includes a substrate, one or more pairs of conductive elements on at least one side of the substrate, a common RF feed point, and respective switches that selectively connects one or all of the conductive elements to the common RF feed point. An omni-directional radiation pattern is generated when all of the conductive elements are connected to the common RF feed point, while a directional radiation pattern is generated when only a pair of conductive elements on opposite sides of the substrate are connected to the common RF feed point. In the directional radiation mode, the conductive elements that are not connected to the common RF feed point act as a reflector for other conductive elements that are connected to the common RF feed point.
    • 能够在宽频带或多个频带上产生全向和定向辐射图案的平面可重构天线包括衬底,衬底的至少一侧上的一对或多对导电元件,公共RF馈电点, 以及各个开关,其选择性地将一个或所有导电元件连接到公共RF馈电点。 当所有导电元件连接到公共RF馈电点时,产生全向辐射图,而当基板的相对侧上仅一对导电元件连接到公共RF馈电时产生定向辐射图 点。 在定向辐射模式中,未连接到公共RF馈电点的导电元件用作连接到公共RF馈电点的其它导电元件的反射器。