[tt] advanced nanotechnology - 2 new articles
Eugen Leitl
<eugen at leitl.org> on
Sun Jan 6 14:11:19 UTC 2008
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Date: Sun, 06 Jan 2008 03:52:05 -0500
To: eugen <eugen at leitl.org>
Subject: advanced nanotechnology - 2 new articles
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"[2]advanced nanotechnology" - 2 new articles
1. [3]Las Vegas to Build World's First 30 Story Vertical Farm
2. [4]Boron nanotubes
3. [5]More Recent Articles
4. [6]Search advanced nanotechnology
[7]Las Vegas to Build World's First 30 Story Vertical Farm
[8]there is a report from next energy news that Las Vegas should have
the first vertical farm by 2010 It is a $200 million project to make a
30 story building. They hope to generate $40 million per year. $25
million from produce and $15 million form tourists. However, no
details about who is building it
[skyfarming070409_1_300b.jpg]
30 story vertical farm
[9][advancednano?i=U8XVcQD] [10][advancednano?i=4J4fVTD]
[11][advancednano?i=re1Voyd] [12][advancednano?i=NnS0CWd]
[13][advancednano?i=TUqJFod] [14][advancednano?i=mMHr8ID]
[15][advancednano?i=zUpmIzd] [16][advancednano?i=zQtTCfD]
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[22]Boron nanotubes
[23]The New Scientist reports onboron nanotubes that will have many
superior properties over carbon nanotubes
According to Xiaobao Yang, Yi Ding and Jun Ni from Tsinghua
University in Beijing, China, the best configuration for boron is
to take the unstable hexagon lattice and add an extra atom to the
centre of some of the hexagons (see image, top right). They
calculate that this is the most stable known theoretical structure
for a boron nanotube.
Their simulation also shows that, with this pattern, boron
nanotubes should have variable electrical properties: wider ones
would be metallic conductors, but narrower ones should be
semiconductors. If so, then boron tubes might be used in
nanodevices similar to the diodes and transistors that have already
been made from carbon nanotubes, says Ni.
Metallic boron nanotubes would still be useful, however, as they
should be better conductors than carbon, and be superconducting at
higher temperatures so if a superconducting nanocomputer is ever
built, it might have boron wiring.
To actually make the boron tubes, Ni suggests chemical vapour
deposition, which is a process already used to grow carbon
nanotubes
[24][advancednano?i=tsN2a5D] [25][advancednano?i=Jw2JNlD]
[26][advancednano?i=dM4KTvd] [27][advancednano?i=SxigqQd]
[28][advancednano?i=bFKDggd] [29][advancednano?i=3V3WUpD]
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Eugen* Leitl <a href="http://leitl.org">leitl</a> http://leitl.org
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