nanotechnology Applied Chemistry0605 Ma Xuelu
nanotechnology Applied Chemistry0605 Ma Xuelu
nanotechnology overview nano- technology Introduction Properties Company Logo
Company Logo nanotechnology overview Introduction Properties nanotechnology
Introduction ant 10-2 metre microelectromechanical cm= 10 mm 10-3 metre mm- 000 microns (um) ust mite 2004m 10metre= 0.1 mm quantum corral of 104m 48 iron atoms on copper surface positioned one at a time with a scanning tunneling microscope tip 14 nm corral diameter human hair 10-50 um wide 10-6 metre 10-7metre= 0.14 1.0 angstroms(A) DNA red blood cell 2-5 um wide 2-12 nm diameter carbon nanotub 2 nm diamete Company Logo
Company Logo Introduction
Introduction the manipulation and redd 7e 0-00m manufacture of materials and devices on the scale of atoms or small groups of atoms.The 0mcms (um) “nanoscale”is typically measured in nanometres,or billionths of a metre,and 230 materials built at this scale often exhibit distinctive DoSoned one 8 physical and chemical atme wth a scannng ngmpp properties.Although usable 14 rm oomral damel devices this small may be decades away techniques for working at the nanoscale have become essential to electronic engineering,and nanoengineered materials have begun to appear in consumer products. 2-12 rmdameet 020En5rpsarlea,c Company Logo
Company Logo Introduction the manipulation and manufacture of materials and devices on the scale of atoms or small groups of atoms. The “nanoscale” is typically measured in nanometres, or billionths of a metre ,and materials built at this scale often exhibit distinctive physical and chemical properties. Although usable devices this small may be decades away ,techniques for working at the nanoscale have become essential to electronic engineering, and nanoengineered materials have begun to appear in consumer products
Introduction For example,billions of inverse micelle microscopic"nanowhis kers,"each about 10 phospholpid molecule nanometres in length, have been molecularly hooked onto natural hydrophilic(polar) and synthetic fibres to phosphate head impart stain resistance hydrophobic(nonpolar) 2005 Encyclopaedia Britannica,c. atty acid tail to clothing and other fabrics;zinc oxide Phospholipid molecules,composed nanocrystals have of fatty acid "tails"and a phosphate been used to create “head,”form an inverse micelle in a invisible sunscreens nonaqueous solution.The that block ultraviolet light;and silver phosphate group converts one end nanocrystals have of the lipid molecule into a polar,or been embedded in hydrophilic,group,leaving the bandages to kill preferentially attracted nonpolar,or bacteria and prevent hydrophobic,end of the molecule to infection. react with the nonaqueous solution. Company Logo
Company Logo Introduction For example, billions of microscopic“nanowhis kers,” each about 10 nanometres in length, have been molecularly hooked onto natural and synthetic fibres to impart stain resistance to clothing and other fabrics; zinc oxide nanocrystals have been used to create invisible sunscreens that block ultraviolet light; and silver nanocrystals have been embedded in bandages to kill bacteria and prevent infection. Phospholipid molecules, composed of fatty acid “tails” and a phosphate “head,” form an inverse micelle in a nonaqueous solution. The phosphate group converts one end of the lipid molecule into a polar, or hydrophilic, group, leaving the preferentially attracted nonpolar, or hydrophobic, end of the molecule to react with the nonaqueous solution