РОССИЙСКАЯ АКАДЕМИЯ НАУК

УРАЛЬСКОЕ ОТДЕЛЕНИЕ

ИНСТИТУТ ХИМИИ TBEPДОГО ТЕЛА
   
| | | | |
| | | |
 19.09.2007   Карта сайта     Language По-русски По-английски
Новые материалы
Экология
Электротехника и обработка материалов
Медицина
Статистика публикаци


19.09.2007


Nanocircuits made easy



18 September 2007



Scientists in Israel have developed a simple way of making complex networks of carbon nanotubes and stamping them onto circuit boards, taking a further step towards building the next generation of smaller, faster microchips. 


Nanotubes are strong, easy to make and excellent conductors of electricity but, to date, manipulating the tiny tubes has proven tricky. But now a team led by Yael Hanien at Tel-Aviv University in Israel has demonstrated a robust and cheap method of arranging carbon nanotubes on different surfaces. 


nanotube circuits








(a) Carbon nanotubes grown between silicon pillars; (b) Raman mapping of the network; (c) Imprinting onto the circuit board; (d) Nanotubes lined up with electrodes



© Yael Hanein



The researchers first grow nanotubes between silicon pillars, arranged to match the shape of the network they want. The nanotubes stick firmly to the top of the pillars, which are coated with silicon dioxide, and grow taught and straight between them. 


Whether nanotubes behave more like a metal or a semiconductor depends on their chirality, so the team used Raman spectroscopy to check their properties with a laser. But in a neat twist, the team were also able to use the same laser to destroy any nanotubes they did not want and create a circuit free of defects. They then stamped the entire network onto a pre-made circuit board or onto a clean surface to which further circuitry could be added later. 



nanotubes








Scanning electron-microscope image with Raman superimposed, showing four silicon pillars with bridging nanotubes.



© Yael Hanein



The team are now trying to improve the stamping process to get a better imprint of the nanotube circuits. They also hope to find better ways of preventing the growth of stray nanotubes. 


Dunwei Wang, a nanomaterials expert at Stanford University, California, told Chemistry World, 'This work provides a creative way to transfer selected nanotubes to a wide range of different substrates. It has the potential to be extended to other systems such as nanowires, but it still doesn't address certain issues like density and uniformity. Nevertheless, this is a great preliminary step.'


 'Depending on the application, we might see real-world uses in a few years, but for more complex tasks, it may be a decade or more,' Wang added. 


Lewis Brindley 



Дизайн и программирование N-Studio 
А Б В Г Д Е Ё Ж З И Й К Л М Н О П Р С Т У Ф Х Ц Ч Ш Щ Ъ Ы Ь Э Ю Я
  • Chen Wev .  honorary member of ISSC science council

  • Harton Vladislav Vadim  honorary member of ISSC science council

  • Lichtenstain Alexandr Iosif  honorary member of ISSC science council

  • Novikov Dimirtii Leonid  honorary member of ISSC science council

  • Yakushev Mikhail Vasilii  honorary member of ISSC science council

  • © 2004-2019 ИХТТ УрО РАН
    беременность, мода, красота, здоровье, диеты, женский журнал, здоровье детей, здоровье ребенка, красота и здоровье, жизнь и здоровье, секреты красоты, воспитание ребенка рождение ребенка,пол ребенка,воспитание ребенка,ребенок дошкольного возраста, дети дошкольного возраста,грудной ребенок,обучение ребенка,родить ребенка,загадки для детей,здоровье ребенка,зачатие ребенка,второй ребенок,определение пола ребенка,будущий ребенок медицина, клиники и больницы, болезни, врач, лечение, доктор, наркология, спид, вич, алкоголизм православные знакомства, православный сайт творчeства, православные рассказы, плохие мысли, православные психологи рождение ребенка,пол ребенка,воспитание ребенка,ребенок дошкольного возраста, дети дошкольного возраста,грудной ребенок,обучение ребенка,родить ребенка,загадки для детей,здоровье ребенка,зачатие ребенка,второй ребенок,определение пола ребенка,будущий ребенок