Thread View: sci.physics
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Started by Boaz Ran
Wed, 29 Dec 1999 00:00
Gold beads
Author: Boaz Ran
Date: Wed, 29 Dec 1999 00:00
Date: Wed, 29 Dec 1999 00:00
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I need gold beads (or other metals) with radius of tenths of nano meters. Thanks
Re: Gold beads
Author: Uncle Al
Date: Wed, 29 Dec 1999 00:00
Date: Wed, 29 Dec 1999 00:00
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Boaz Ran wrote: > I need gold beads (or other metals) with radius of tenths of nano > meters. *Tenths* of nanometers? How big is a gold atom? There aren't any metal "beads" at that scale. The best you can do is colloidal nanocrystals whose surfaces are decorated with amine, phosphine, or thiol anti-aggregants. It's in the literature. -- Uncle Al http://www.mazepath.com/uncleal/ http://www.ultra.net.au/~wisby/uncleal/ http://www.guyy.demon.co.uk/uncleal/ (Toxic URLs! Unsafe for children and most mammals) "Quis custodiet ipsos custodes?" The Net!
Re: Gold beads
Author: Ralph E. Frost
Date: Thu, 30 Dec 1999 00:00
Date: Thu, 30 Dec 1999 00:00
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Boaz Ran wrote: > > I need gold beads (or other metals) with radius of tenths of nano > meters. Me too. Three hundred ounces should do. :-) How many do you need? -- Best regards, Ralph E. Frost http://www.dcwi.com/~refrost/index.htm ..Feeling is believing..
Re: Gold beads
Author: David
Date: Mon, 03 Jan 2000 00:00
Date: Mon, 03 Jan 2000 00:00
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Tenths of nano-meters? They're called atoms. Ralph E. Frost <refrost@dcwi.com> wrote in message news:386A9F58.D366B275@dcwi.com... > Boaz Ran wrote: > > > > I need gold beads (or other metals) with radius of tenths of nano > > meters.
Re: Gold beads
Author: Tom van Rijswijk
Date: Mon, 03 Jan 2000 00:00
Date: Mon, 03 Jan 2000 00:00
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The atomic radius of a gold atom is 0.144 nanometer (1.44 Angstrom), so what he needs are single gold atoms. I don't think those qualify as "beads" regards Tom Uncle Al wrote: > Boaz Ran wrote: > > > I need gold beads (or other metals) with radius of tenths of nano > > meters. > > *Tenths* of nanometers? How big is a gold atom? There aren't any > metal "beads" at that scale. The best you can do is colloidal > nanocrystals whose surfaces are decorated with amine, phosphine, or > thiol anti-aggregants. > > It's in the literature. > > -- > Uncle Al > http://www.mazepath.com/uncleal/ > http://www.ultra.net.au/~wisby/uncleal/ > http://www.guyy.demon.co.uk/uncleal/ > (Toxic URLs! Unsafe for children and most mammals) > "Quis custodiet ipsos custodes?" The Net!
Re: Gold beads
Author: foozleman
Date: Thu, 13 Jan 2000 00:00
Date: Thu, 13 Jan 2000 00:00
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Uncle Al wrote: > *Tenths* of nanometers? How big is a gold atom? There aren't any > metal "beads" at that scale. The best you can do is colloidal > nanocrystals whose surfaces are decorated with amine, phosphine, or > thiol anti-aggregants. > > It's in the literature. Your comment is of *extreme* interest to me, since I've just discovered that a biological hydrogen-bonded complex I've been working with has "nanocolloid" properties...and it does tend to aggregate. Colloid chemistry & physics is not my field. Can you give me a clue as to where in the literature I can find out about "amine, phosphine, or thiol anti-aggregants"? I've tried some web searches, to no avail. Thanks! PS Your web site is a gas! (Xenon, I think.) ------------------------------------------------------------------------ To respond directly, drop "no" from return address. --foozleman
Re: Gold beads
Author: Uncle Al
Date: Fri, 14 Jan 2000 00:00
Date: Fri, 14 Jan 2000 00:00
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foozleman@no.worldnet.att.net wrote: > > Uncle Al wrote: > > > *Tenths* of nanometers? How big is a gold atom? There aren't any > > metal "beads" at that scale. The best you can do is colloidal > > nanocrystals whose surfaces are decorated with amine, phosphine, or > > thiol anti-aggregants. > > > > It's in the literature. > > Your comment is of *extreme* interest to me, since I've just discovered > that a biological hydrogen-bonded complex I've been working with has > "nanocolloid" properties...and it does tend to aggregate. Colloid > chemistry & physics is not my field. Can you give me a clue as to where > in the literature I can find out about "amine, phosphine, or thiol > anti-aggregants"? I've tried some web searches, to no avail. Thanks! > > PS Your web site is a gas! (Xenon, I think.) It's all over J. Am. Chem. Soc. and other places. http://google.com/ "quantum dots" or nanocrystals Easy. Trivially easy. http://www.mitre.org/research/nanotech/quantum_dot.html http://www.physics.gatech.edu/research/whetten/ for gold. -- Uncle Al http://www.mazepath.com/uncleal/ http://www.ultra.net.au/~wisby/uncleal/ http://www.guyy.demon.co.uk/uncleal/ (Toxic URLs! Unsafe for children and most mammals) "Quis custodiet ipsos custodes?" The Net!
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