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Colloidal Synthesis of Copper Nanoparticles. Investigation on Nanofabrication in a Two-phase Liquid-liquid System

Формат:      Страниц 128
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Nafiseh D.    
Книга по Требованию    
2403 руб
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Several modifications were made to the original recipe to produce copper nanoparticles with high degrees of purity and stability. Copper nanoparticles are potentially applicable in various industries and are considered as an alternative for expensive metal nanoparticles, such as gold, silver, and platinum. The synthesis recipe used in this work was originally applied for the fabrication of alkylamine-capped gold nanoparticles. This method involves transferring metal cations from the aqueous layer to the organic one by the phase transfer reagent, tetraoctylammonium bromide, followed by reduction with sodium borohydride in the presence of oleylamine, which was used as the stabilising ligand. Due to the high tendency of copper for oxidation, all of the synthesis experiments were carried out in a glove box under the flow of an inert gas (N2 or Ar). Synthesis of copper nanoparticles by a colloidal recipe in a two-phase liquid-liquid mixture (toluene/water) was investigated. Going through the results and discussion provided in this book, the reader understand the challenges that one may cope with while conducting colloidal nanofabrication of active metals, such as copper.
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DVD -rom диски
В то время, как метки на обычных дисках непрозрачны для луча лазера, двухсторонние диски DVD требуют использования специальных голографических меток. Кроме того, двухсторонние диски DVD более чувствительны к повреждениям поверхности, поскольку в них как углеродная пленка, так и отражающие слои тоньше. В ожидания большего Теперь, когда имеется возможность использования одно- и двухсторонних, а также одно- и двухслойных дисков, возникает необходимость по крайней мере в пяти физических форматах. Но и это еще не все. В этом году ожидается появление дисков DVD-R. Идейно они подобны CD-R - это диски с однократной возможностью записи, в которых вместо углеродной пленки используется слой органического красителя. Запись производится путем выжигания отверстий в этом слое. Правда, из-за некоторых ограничений, связанных с применением красителя, емкость односторонних дисков DVD-R меньше, чем DVD-ROM (около 4 GB по сравнению с 4,7 GB). Кроме того, подобная технология не подходит для создания двухслойных дисков. В DVD-RAM, появление которых ожидается в 1998 г., для обеспечения возможности многократной перезаписи будет использоваться материал, в котором одновременно могут сосуществовать две фазы (rewri able phase-cha ge ma erial).

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Молочный гриб можно использовать для похудения, восстановления микрофлоры, очищения организмаМолочный гриб можно использовать для похудения, восстановления микрофлоры, очищения организма

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