Kevin Eric
Kevin Eric Shopsowitz, Vancouver CA
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20110248214 | INORGANIC MESOPOROUS MATERIALS WITH CHIRAL NEMATIC STRUCTURES AND PREPARATION METHOD THEREOF - The present invention describes a composition and a method for producing mesoporous silica materials with a chiral organization. In the method, a polymerizable inorganic monomer is reacted in the presence of nanocrystalline cellulose (NCC) to give a material of inorganic solid with cellulose nanocrystallites embedded in a chiral nematic organization. The NCC can be removed to give a stable porous structure that retains the chiral organization of the NCC template. The new materials may be obtained as iridescent free-standing films with high surface area. Through control of the reaction conditions, the colour of the films can be varied across the entire visible spectrum. These are the first materials to combine mesoporosity with long-range chiral ordering that leads to photonic properties. Examples of possible applications of the materials are: lightweight reinforcement materials, low k dielectric materials, tunable reflective filters, adsorbents, stationary phases for chromatography of chiral or achiral substances, supports for catalysts (e.g., for asymmetric synthetic transformations), and as a template to generate other new porous materials (e.g., porous carbon or porous metals), preferably with chiral nematic structures. | 10-13-2011 |
20130089492 | CHIRAL NEMATIC NANOCRYSTALLINE METAL OXIDES - A mesoporous metal oxide materials with a chiral organization; and a method for producing it, in the method a polymerizable metal oxide precursor is condensed inside the pores of chiral nematic mesoporous silica by the so-called “hard templating” method. As a specific example, mesoporous titanium dioxide is formed inside of a chiral nematic silica film templated by nanocrystalline cellulose (NCC). After removing the silica template such as by dissolving the silica in concentrated aqueous base, the resulting product is a mesoporous titania with a high surface area. These mesoporous metal oxide materials with high surface area and chiral nematic structures that lead to photonic properties may be useful for photonic applications as well as enantioselective catalysis, photocatalysis, photovoltaics, UV filters, batteries, and sensors. | 04-11-2013 |
Kevin Eric Shopsowitz, Boston, MA US
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20140295161 | CHIRAL OR ACHIRAL, MESOPOROUS CARBON - A composition and a method for producing mesoporous carbon materials with a chiral or achiral organization. In the method, a polymerizable inorganic monomer is reacted in the presence of nanocrystalline cellulose to give a material of inorganic solid with cellulose nanocrystallites organized in a chiral nematic organization. The cellulose can be carbonized through thermal treatment under inert atmosphere (e.g., nitrogen or argon) and the silica may subsequently be removed using aqueous solutions of sodium hydroxide (NaOH) or hydrogen fluoride (HF) to give the stable mesoporous carbon materials that retain the chiral nematic structure of the cellulose. These materials may be obtained as free-standing films with very high surface area. Through control of the reaction conditions the pore-size distribution may be varied from predominantly microporous to predominantly mesoporous materials. These are the first materials to use cellulose as both the structural template and carbon source for a mesoporous carbon material. These are also the first carbon materials to combine mesoporosity with long-range chiral ordering. Possible applications for these materials include: charge storage devices (e.g. supercapacitors and anodes for Li-ion batteries), adsorbents, gas purifiers, light-weight nanocomposite materials, catalyst supports (e.g., for chiral transformations), gas storage, and as a hard-template to generate other materials, preferably with chiral structures. | 10-02-2014 |
20150064093 | MESOPOROUS SILICA AND ORGANOSILICA MATERIALS AND PROCESS FOR THEIR PREPARATION - In this invention, we disclose a method as well as silica and/or organosilica mesoporous materials obtained by templating using nanocrystalline cellulose and removal of the latter using acidic conditions. The resultant mesoporous silica materials are characterized by having high surface area with tunable iridescence resulting from the long-range chiral nematic organization. This invention is an improvement over the formation of composite materials formed with nanocrystalline cellulose (NCC) and silica, where the calcination of the materials led to removal of the cellulose and formation of a mesoporous silica material. Characteristically, the removal of the NCC template using acidic conditions differentiates the silica materials thus obtained in two ways: (1) It does not lead to as significant contraction of the materials as from calcination thereby giving access to materials with larger mesopores; and (2) it allows the formation of mesoporous chiral nematic compositions that include heat-sensitive components. This approach may be used to prepare the first example of a mesoporous organosilica material with a chiral nematic pore structure. Examples of possible applications of this material include optical filters, adsorbents, chiral stationary phases for chromatography, sensors, composite materials, membranes, and templates for creating other chiral materials. | 03-05-2015 |
Kevin Eric Shopsowitz, Brookline, MA US
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20160002457 | TUNABLE AND RESPONSIVE PHOTONIC HYDROGELS COMPRISING NANOCRYSTALLINE CELLULOSE - Composite hydrogels with a chiral organization with tunable responsive photonic properties are conceived. A polymerizable hydrophilic monomer such as acrylamide is reacted in the presence of nanocrystalline cellulose (NCC) to give a composite hydrogel with cellulose nanocrystals embedded in a chiral nematic organization. Through control of the reaction conditions, the hydrogel can exhibit photonic colour that can be varied throughout the visible and near-infrared regions. The colour shifts substantially and reversibly upon swelling and shrinking of the hydrogel through solvation in aqueous and nonaqueous media. The responsive properties can be tailored both through choice of monomer and/or through chemical modification of the NCC surface. Examples of possible applications of the materials are: tunable reflective filters, chemical sensors, stationary phases for electrophoresis of chiral or achiral substances, and as a template to generate new materials with chiral nematic structures. | 01-07-2016 |
Kevin Eric Wong, Sausalito, CA US
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20090313134 | RECOVERY OF TRANSACTION INFORMATION - Online transaction processing over a communication network involves receiving a transaction input comprising an authorization request message for a transaction conducted over a communication network between a consumer and a merchant using a portable consumer device having a memory, wherein the authorization request message contains data comprising a transaction total amount for the transaction and additional information not stored in the memory of the portable consumer device and related to the transaction. Issuer authorization processing is performed in response to the authorization request message data, and a decision output is produced in response to the transaction input and the issuer authorization processing. Thus, a decision output is produced in an efficient manner using additional information for the issuer authorization processing, and the additional information reduces the likelihood of declining a transaction that should otherwise be authorized. | 12-17-2009 |
20150073989 | SYSTEMS AND METHODS TO TRANSMIT CONSUMER INFORMATION IN CONNECTION WITH PAYMENT TRANSACTIONS - A computing apparatus includes: a portal configured to provide a user interface to a user to specify a privacy policy of the user and to receive consumer data of the user; a data warehouse coupled with the portal to store the privacy policy in connection with account information identifying a payment account of the user; a payment processor of a payment processing network configured to process payment transactions made using payment accounts and store in the data warehouse transaction data recording the payment transactions processed by the payment processor; and a rule engine coupled with the payment processor and the data warehouse to determine, in response to a payment transaction made using the account information for a payment to a merchant on behalf of the user, whether or not to transmit the consumer data of the user to the merchant in accordance with the privacy policy of the user. | 03-12-2015 |