[CrackMonkey] I was gonna' post about Carnivore brand net-filter, but here's some thing completely different: nano-poly-plotter (molecular "lithography"/"xerography")

George J.P. Perry geoperry at iww.org
Wed Jul 12 17:07:23 PDT 2000


---------- Forwarded message ----------
Date: Wed, 12 Jul 2000 15:21:02 -0700
From: American Patriot Friends Network <apfn at apfn.org>
To: American Patriot Friends Network <apfn at apfn.org>
Subject: (Q) IS THIS TOP SECRET? - (A) NO! NOBODY UNDERSTANDS IT!

(Q) IS THIS TOP SECRET? - (A) NO! NOBODY UNDERSTANDS IT!

THIS MESSAGE WAS POSTED AT:
http://byamerican.com/cgi-bin/ast/config.cgi?read=18399
POSTED BY: Dr. Ken Kubos -  kk at msn.com
Date: Monday, 19 June 2000, at 8:58 a.m. 

: Source: Northwestern University ( http://www.nwu.edu /) 

: Date: Posted 6/16/2000 

: Northwestern Chemist Develops Nanoplotter With Parallel Writing Capabilities 

: EVANSTON, Ill. -- In a paper to be published in the June 9 issue of the 
: journal Science, researchers at Northwestern University demonstrate an 
: eight-pen nanoplotter capable of simultaneously creating eight identical 
: patterns drawn with tiny lines of molecular ink. Each line is only 30 
: molecules wide and one molecule high. This breakthrough transforms dip-pen 
: nanolithography (Science, Oct. 15, 1999) from a serial process into a 
: parallel process, paving the way to making it competitive with other 
: optical and stamping lithographic methods used for patterning large areas 
: on metal and semiconductor substrates, including silicon wafers. 

: "Our multiple-pen, parallel process nanoplotter gives the 
: nanotechnologist a powerful new tool," said Chad Mirkin, George B. 
: Rathmann Professor of Chemistry. "The miniaturization of the plotter 
: writing technique opens up exciting avenues of doing things differently, 
: better and on a much smaller scale than they are today." 

: Mirkin and fellow author Seunghun Hong, a postdoctoral researcher at 
: Northwestern, report that the nanoplotter could be equipped with a 
: significantly greater number of pens than a mere eight. The technology 
: should be able to support hundreds, or even a thousand, of tiny nanopens 
: working together at the same time to miniaturize electronic circuits, 
: pattern precise arrays of organic and biomolecules such as DNA and put 
: thousands of different medical sensors on an area much tinier than the 
: head of a pin. 

: A major limitation of other scanning probe lithography (SPL) methods is that 
: contact between the tip and the substrate (the writing surface) changes 
: the line width and quality of each patterned structure. Therefore, each 
: tip requires a separate feedback system in order to control each line, 
: which means a large amount of expensive and complex instrumentation. 

: Mirkin's parallel nanoplotter, however, produces consistent line widths with 
: multiple pens and requires only one feedback system for the entire device. 
: The reason for this lies in a tiny drop of water. 

: In dip-pen nanolithography (DPN), "inks" of organic molecules are 
: applied to an atomic force microscope (AFM), which serves as the writing 
: tool. The molecular ink then is deposited onto an underlying substrate, or 
: "paper," via a tiny capillary in the water droplet that forms 
: naturally at the tip. DPN is a nano-version of the 4,000-year-old quill 
: pen. 

: When taking the DPN plotter to a parallel process, Mirkin's team made an 
: important scientific discovery. When the writing tips were applied to the 
: substrate using different contact forces, the pens still produced 
: identical dots and lines, with respect to diameter and line width. In 
: other words, with increased pressure, only the water at the AFM tip 
: spreads out, but the width of the nanocapillary, through which the ink 
: flows, remains constant. 

: This discovery means that only one pen of the multi-pen device needs to be 
: "smart" or have its tip equipped with a feedback system. This 
: pen is called the imaging tip and is used for both imaging and writing. As 
: it patterns an area, sensors in the imaging tip communicate with the 
: customized computer software that drives the nanoplotter. In the case of 
: the eight-pen nanoplotter, the other seven writing tips are passive and 
: follow the lead of the pen with the imaging tip, drawing identical 
: patterns a fixed distance apart. 

: Mirkin and Hong demonstrated the nanoplotter's parallel writing capability by 
: first drawing two squares using the same ink, then two squares made of two 
: different inks, and finally drawing eight identical patterns -- a set of a 
: dot, a line, an octagon and a square -- made using the same ink. In each 
: demonstration, the patterns were perfectly aligned with respect to each 
: other. 

: The nanoplotter also can be used in a serial fashion to create nanostructures 
: made up of different inks, one ink being added after another to build the 
: final structure. 

: In addition to requiring only one feedback system, Mirkin's nanoplotter has 
: other advantages. It can be automated, it uses a relatively inexpensive 
: tool (an atomic force microscope) that is common in the laboratories of 
: companies and universities, and it works under normal atmospheric 
: conditions as opposed to a billion-dollar semiconductor fab line. 

: "Ideally, we want to have total control over the chemical composition, 
: or architecture, of the nanostructures we build down to the sub-10 
: nanometer regime," said Mirkin, also director of Northwestern's 
: Institute for Nanotechnology and Center for Nanofabrication and Molecular 
: Self-Assembly. "It's a level of refinement that will open the doors 
: to remarkable scientific discovery and the realization of exciting new 
: technologies. The parallel process nanoplotter takes us closer to our 
: goal." 

: Mirkin's next step is to expand the current nanoplotter's capabilities. He 
: hopes to have a working 50-pen nanoplotter by the end of next year. 

: "It soon will be possible to pattern one master plate with thousands of 
: different organic nanostructures, each structure designed to react with a 
: certain disease agent, for example," said Mirkin. "That's what 
: is exciting about this -- no other method exists to do this on such a 
: small scale." 

: In the case of biomolecules like DNA, it will be possible to generate 
: ultrahigh density combinatorial arrays that could be quite useful in the 
: genomics and medical diagnostics industries. Such arrays are currently 
: generated via techniques with much lower resolution than DPN. 

: The research was funded by the U.S. Air Force Office of Scientific Research, 
: the Defense Advanced Projects Research Agency and the National Science 
: Foundation-funded Northwestern University Materials Research Center. 
==============================================================================

Molecular Electronics Will Change Everything ---  Nanopores, Thiophene Ethynylene.
Posted By: Dr. Ken Kubos - kk at msn.com  Date: Tuesday, 11 July 2000, at 8:24 a.m. 
http://byamerican.com/cgi-bin/ast/config.cgi?read=18590

: In the case of biomolecules like DNA, it will be possible to generate 
: ultrahigh density combinatorial arrays that could be quite useful in the 
: genomics and medical diagnostics industries. Such arrays are currently 
: generated via techniques with much lower resolution than DPN. 

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