On surface O-glycosylation by catalytic microcontact printing
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Carbohydrate microarrays are made by microcontact printing of glycosyl donors on hydroxyl terminated substrates.Keywords:
Microcontact Printing
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
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Modern patterning and fabrication techniques provide powerful opportunities for the preparation of micro- and nanostructured objects with applications in fields ranging from drug delivery and bioimaging to organic based electronic devices and real time biochemical sensors. In this thesis we report a systematic study focused on the development of new unconventional patterning and fabrication techniques with applications in the preparation of functional micro- and nanostructured devices. Catalytic microcontact printing is a powerful technique that offers a simple and effective methodology for patterning chemically-functionalized surfaces with sub-100 nm accuracy. By avoiding diffusive mechanisms of pattern replication it effectively obviates the most significant limitation of traditional microcontact printing - lateral molecular ink diffusion. Moreover, catalytic microcontact printing significantly expands the diversity of patternable surfaces by using prefunctionalized substrates and gives rapid facile access to chemically discriminated surfaces that can be further functionalized with organic and biological molecules. We have developed several catalytic microcontact printing techniques that transfer pattern from an elastomeric stamp bearing an immobilized catalyst to a preformed functionalized self-assembled monolayer. By avoiding diffusive pattern transfer we were able to replicate features with sub-50 nm edge resolution. We also demonstrated that catalytic printing can be expanded to technologically important substrates not accessible through conventional soft lithography, by patterning reactive organic monolayers grafted to chemically passivated silicon. The non-symmetric structure of Janus particles produces novel physical properties and unusual aggregation behavior that makes these materials attractive candidates for drug delivery and as nano-sensors and nano-probes, SERS and PEF imaging agents, small molecules carriers, and switchable devices. We have developed a new protocol for preparation of non-spherical inorganic Janus particles comprising metallic and semiconductor layers. The method allows for precise control over the composition, shape and size and permits fabrication of non-symmetrical particles, the opposite sides of which can be orthogonally functionalized using well-established organosilane and thiol chemistries.
Microcontact Printing
Soft Lithography
PDMS stamp
Self-assembled monolayer
Contact print
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Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
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Abstract The O‐glycosylation of several deoxythioglycosides such as (I) and alcohols using DDQ under UV‐irradiation is realized using a single electron transfer mechanism.
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Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Mannich reaction
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Abstract Microcontact printing (µCP) offers a simple and low‐cost surface patterning methodology with high versatility and sub‐micrometer accuracy. The process has undergone a spectacular evolution since its invention, improving its capability to form sub‐100 nm SAM patterns of various polar and apolar materials and biomolecules over macroscopic areas. Diverse development lines of µCP are discussed in this work detailing various printing strategies. New printing schemes with improved stamp materials render µCP a reproducible surface‐patterning technique with an increased pattern resolution. New stamp materials and PDMS surface‐treatment methods allow the use of polar molecules as inks. Flat elastomeric surfaces and low‐diffusive inks push the feature sizes to the nanometer range. Chemical and supramolecular interactions between the ink and the substrate increase the applicability of the µCP process.
Microcontact Printing
Nanometre
Micrometer
PDMS stamp
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Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
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Бұл зерттеужұмысындaКaно моделітурaлы жәнеоғaн қaтыстытолықмәліметберілгенжәнеуниверситетстуденттерінебaғыттaлғaн қолдaнбaлы (кейстік)зерттеужүргізілген.АхметЯссaуи университетініңстуденттеріүшін Кaно моделіқолдaнылғaн, олaрдың жоғaры білімберусaпaсынa қоятынмaңыздытaлaптaры, яғнисaпaлық қaжеттіліктері,олaрдың мaңыздылығытурaлы жәнесaпaлық қaжеттіліктерінеқaтыстыөз университетінқaлaй бaғaлaйтындығытурaлы сұрaқтaр қойылғaн. Осы зерттеудіңмaқсaты АхметЯсaуи университетіндетуризмменеджментіжәнеқaржы бaкaлaвриaт бaғдaрлaмaлaрыныңсaпaсынa қaтыстыстуденттердіңқaжеттіліктерінaнықтaу, студенттердіңқaнaғaттaну, қaнaғaттaнбaу дәрежелерінбелгілеу,білімберусaпaсын aнықтaу мен жетілдіружолдaрын тaлдaу болыптaбылaды. Осы мaқсaтқaжетуүшін, ең aлдыменКaно сaуaлнaмaсы түзіліп,116 студенткеқолдaнылдыжәнебілімберугежәнеоның сaпaсынa қaтыстыстуденттердіңтaлaптaры мен қaжеттіліктерітоптықжұмыстaрaрқылыaнықтaлды. Екіншіден,бұл aнықтaлғaн тaлaптaр мен қaжеттіліктерКaно бaғaлaу кестесіменжіктелді.Осылaйшa, сaпa тaлaптaры төрт сaнaтқa бөлінді:болуытиіс, бір өлшемді,тaртымдыжәнебейтaрaп.Соңындa,қaнaғaттaну мен қaнaғaттaнбaудың мәндеріесептелдіжәнестуденттердіңқaнaғaттaну мен қaнaғaттaнбaу деңгейлерінжоғaрылaту мен төмендетудеосытaлaптaр мен қaжеттіліктердіңрөліaйқын aнықтaлды.Түйінсөздер:сaпa, сaпaлық қaжеттіліктер,білімберусaпaсы, Кaно моделі.
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