Nanoscale Reversible Mass Transport for Archiving Computer Memory that Can Last One Billion Years

Nanoscale reversible mass transport computer memory has been demonstrated by Zettl Research Group, Lawrence Berkeley National Laboratory and University of California at Berkeley.

In separate but related research in Japan, Daisuke Takagi at NTT Basic Research Laboratories in Atsugi, Japan, decided to replace the metal nanoparticles (the seeds for growing carbon nanotubes) with a densely packed layer of diamonds, each around 5 nanometres across. Passing ethanol gas over these diamonds created a lush forest of nanotubes 1 to 2 nanometres wide. Carbon nanotubes grown from diamond nanoparticles can be grown closer together. This could eventually allow the carbon nanotube memory shuttle memory from Berkeley to be grown closer together.

Abstract for the Nanoscale Reversible Mass Transport for Archival Memory

We report on a simple electromechanical memory device in which an iron nanoparticle shuttle is controllably positioned within a hollow nanotube channel. The shuttle can be moved reversibly via an electrical write signal and can be positioned with nanoscale precision. The position of the shuttle can be read out directly via a blind resistance read measurement, allowing application as a nonvolatile memory element with potentially hundreds of memory states per device. The shuttle memory has application for archival storage, with information density as high as 10**12 bits/in2, and thermodynamic stability in excess of one billion years.

The reversibility of the nanoparticle motion allows a memory “bit” that can be rewritten. Here we show this property, moving the nanoparticle back and forth over the position threshold defining the state of the device. A nanoparticle of iron is moved with carbon nanotubes

6 pages of supporting info for the carbon nanotube grown from diamond seed work.

The carbon nanotubes grown from diamond seeds are still tangled.

0 thoughts on “Nanoscale Reversible Mass Transport for Archiving Computer Memory that Can Last One Billion Years”

  1. Population estimate 1.33 billion in 2007 (0.6% increase) Add in Hong Kong and Macau 8 million.
    Total population in 2008 1.35 billion.

    The overall GDP is 3.6 trillion and heading to 4 trillion this year with growth and exchange rate increases.

    The bottom one billion would approximate the economy of India but would be richer by 200% [US$2 trillion, or kind of like India plus Mexico with a bit fewer people] and the then the top 350 million (including Hong Kong) would be like Brazil but richer and more populated by 60%.

    The top 4 provinces in China in terms of GDP plus Shanghai and Hong Kong.

    Guangdong 3.2 trillion yuan
    [US$470 billion, $5k/per cap]
    Shandong 2.7 trillion
    [US$390 billion, $4k/per cap]
    Jiangsu 2.6 T yuan
    [US$380 billion]
    Zhejiang 1.9 T yuan
    [US$280 billion]
    Shanghai US$165B(U$9000 per cap)
    Hong Kong US$218B in 2008

    330 million people
    US$1.9 trillion GDP.

    The provincial GDP has jumped from 1350.2 billion RMB in 2002, to 3060.6 billion RMB in 2007, with an average annual growth of 14.5%. About US$500 billion. Its ratio in proportion to the national GDP increased from 1/9 to 1/8. Guangdong’s GDP, after overtaking those of Singapore and Hong Kong, has surpassed that of Taiwan. Guangdong’s GDP per capita has reached 4000 US dollars. Guangdong population at the end of 2007 is 94.49 million

    In 2007, the nominal GDP for Shandong was 2.59 trillion yuan (US$340 billion), ranking second in the country (behind Guangdong and ahead of Jiangsu). It’s GDP per capita was 27,723 yuan (US$3,646), ranking seventh.

    Shanghai 18.5 million
    US$157.8 billion (7th)
    Per cap US$8,949 (13th)
    Population (2006)
    75,495,000 (5th)
    GDP (2007)
    CNY 2.56 trillion (3rd)
    CNY 33,689 (5th) per cap GDP

    Population (2004)
    47,200,000 (11th)

    GDP (2007)
    CNY 1.86 trillion (4th)
    CNY 37,128 (4th) per capita

  2. I wonder how China’s GDP would look, if one treated it as if it were the two separate countries it sort of resembles – a modern, hyper-dynamic urban country, and a relatively impoverished rural country.


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