Medical University of South Carolina

Sangmoon Park

Thomas Vogt

Goutam Koley

Muhammad Qazi

Methods and systems of detecting analytes using a microcantilever system are generally described. The microcantilever system generally includes micro- or nano-sized elements that can be electrostatically driven to resonance. Utilizing the disclosed devices and methods, direct electronic detection of the resonant frequency, changes of the resonant frequency, and associated phase signal of a micro- or nano-sized element can be utilized to measure the presence of a targeted analyte. The detection system of the present invention utilizes a non-contact microcantilever device. That is, the surface of the microcantilever (e.g., the surface of the resonating beam) does not bond or otherwise attach to an analyte or other chemical. Thus, the microcantilever device, including the resonating beam, can be kept in pristine condition during and even after repeated use.

Method of sensing chemical and bio-molecular analytes and sensing system using a microcantilever

A light emitting device comprising a light producing element configured to generate ultraviolet light having a wavelength of from about 250 nm to about 400 nm and a self-activating phosphor comprising an ordered oxyfluoride compound is provided. The nitrogen-free or nitrogen-containing ordered oxyfluoride compound has a formula:ARMOF&#x2014;Nwhere A is Sr alone or Sr mixed with Ba and/or Ca such that A comprises at least about &#x2154; mole % of Sr and up to about &#x2153; mole percent of Ba and/or Ca; R is a rare earth element or a mixture of rare earth elements; M is Al, Ga, In, W, Mo, Bi, or mixtures thereof; 0&#x3c;a&#x2266;0.3; &#x3b4;1 and &#x3b4;2 are both from about 0.01 to about 0.1; and 0&#x2266;w&#x2266;0.05 such that 0&#x2266;w'&#x2266;0.1 and 0&#x2266;w&#x2033;&#x2266;0.15. The ultraviolet light excites the self-activating phosphor such that the self-activating phosphor emits visible light having a wavelength of from about 380 to about 750 nm.

Inorganic luminescent phosphor materials for lighting

Materials suitable for use in highly energy-efficient production of white light through photo-luminescence, such as in light emitting devices, are generally provided. A composition comprising a compound having the formula: SrAMOFwherein A is Ca, Ba, or a mixture thereof; M is Al, Ga, In, W, Mo, or a mixture thereof; 0&#x2266;v&#x2266;1; 0&#x3c;x&#x3c;0.4; and 0&#x3c;y&#x3c;0.2 is generally described. A composition comprising a compound having the formula: SrAInMOF, where A is Ca, Ba, or a mixture thereof; M is Al, Ga, W, Mo, or a mixture thereof; 0&#x2266;v&#x2266;1; 0&#x3c;m&#x3c;1; and 0&#x3c;x&#x3c;4 is also provided. Nitrogen can be substituted for a portion of the oxygen atoms in these structures. Methods introducing defects into a compound by removing a portion of oxygen and fluorine atoms from the compound are also provided.

Growing community of inventors

Busan, South Korea

Sangmoon Park