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您的检索式：作者名="Alaa Fathy"
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| 1 | On-chip parallel Fourier transform spectrometer for broadband selective infrared spectral sensing显示文摘Optical spectrometers enable contactless chemical analysis.However,decreasing both their size and cost appears to be a prerequisite to their widespread deployment.Chip-scale implementation of optical spectrometers still requires tackling two main challenges.First,operation over a broad spectral range extending to the infrared is required to enable covering the molecular absorption spectrum of a broad variety of materials.This is addressed in our work with an Micro-Electro Mechanical Systems(MEMS)-based Fourier transform infrared spectrometer with an embedded movable micro-mirror on a silicon chip.Second,fine spectral resolutionΔλis also required to facilitate screening over several chemicals.A fundamental limit states thatΔλis inversely proportional to the mirror motion range,which cannot exceed the chip size.To boost the spectral resolution beyond this limit,we propose the concept of parallel(or multi-core)FTIR,where multiple interferometers provide complementary optical paths using the same actuator and within the same chip.The concept scalability is validated with 4 interferometers,leading to approximately 3 times better spectral resolution.After the atmospheric contents of a greenhouse gas are monitored,the methane absorption bands are successfully measured and discriminated using the presented device. | Alaa Fathy Yasser M.Sabry Sebastien Nazeer Tarik Bourouina Diaa A.Khalil | 2020 | Microsystems & Nanoengineering2020，6，1： | 1 |
| 2 | Heterocyclization of thiocarbonohydrazides:Facile synthesis of 5-unsubstituted-1,3,4-thiadiazoles显示文摘2-(Hydrazinecarbothioyl)-N-substituted hydrazinecarbothioamides react with 2,3,5,6-tetrachloro-l,4-benzoquinone in high yields in a novel fast and facile method to give 5-unsubstituted-l,3,4-thiadiazole-2-amine derivatives.The synthesized compounds were characterized by spectroscopic methods and confirmed by using X-ray crystallography.A rationale for the formation of the products is presented. | Alaa A.Hassan Fathy F.Abdel-Latif Mohamed Abdel Aziz Sara M.Mostafa Stefan Brse Martin Nieger | 2015 | Chinese Chemical Letters2015，26，9： | 0 |
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