eNehtpQ;QhdKk; eNehnjhopDl;gKk; (Nanoscience and Nanotechnology) O\/ngqzuise< B.Sc(Hons), M.Sc(nanoscience,Reading) Research Assitant Photochemistry Institute of Fundamental Studies Sri Lanka.
eNehtpQ;QhdKk;
eNehnjhopDl;gKk;(Nanoscience and Nanotechnology)O\/ngqzuise<B.Sc(Hons), M.Sc(nanoscience,Reading)Research AssitantPhotochemistryInstitute of Fundamental StudiesSri Lanka.
eNehnjhopDl;gk; vd;why; vd;d?
eNehnjhopDl;gk; vd;w NjlYf;F
gqm<mk<km<m 8,960,000 K[g<Ggt<!Lcuiggqjmg<Gl<! (0.15 seconds) ‐
fOfiuqR<Riek<kqe<!uvziX
• “gQOp fqjxb njxgt<!dt<te”• “There is plenty of rooms at the bottom”
gzqOhieqbi okipqEm<h fqXuel<!ohtkQgg<gpgl<.2:6:!
• Caltech, American Physical Society-1959
“eNehnjhopDl;gk;” vd;w gjj;ij
mwpKfg;gLj;jpatu; ahu;?
• OmigqObi uqR<Rieh<!hz<gjzg<gpgOhvisqvqbiv<!ofixqObi keqGs<sq we<huviz<!2:85. Prof Norio Taniguchi
• fOfi ntuqjmbqz<!hkiv<k<kr<gtqe<!sqxh<hqbz<HgjtBl<!Nvib<f<K uqtg<gqeiv<
wvqg<!covg<^<zv<Dr. K. Eric Drexler
wvqg<!covg<^<zv<Dr. K. Eric Drexler
• fOfiokipqFm<hk<jk gVKOgitigue<xqNkivH,v<ulig ogit<jg nch<hjmbqz<!n[g<gjtBl<!&zg<%XgjtBl<!jgbip<uK hx<xquqtg<gqeiv<. 1981
• Engines of Creation: The Coming Era of Nanotechnology
• Nanosystems: Molecular Machinery, Manufacturing, and Computation, (ISBN 0‐471‐57518‐6).
• Drexler's vision of nanotechnology is often called "Molecular Nanotechnology" (MNT) or "molecular manufacturing," and Drexler at one point proposed the term "zettatech" which never became popular.
dzg npqU@
• Grey goo we<hK &zg<%x<X fOfiokipqEm<hnch<hjmbqz<!njlf<k yV gVKOgit<!nch<hjmbie dzg npquiGl</
• -r<G gm<cz<zik ntuqz<! self‐replicatingrobots gt<!H,lqbqZt<t smh<ohiVm<gjtuqPr<gq nOklikqvqbie hqvkqgjtdVuig<Gl<!fqgp<uiGl</!-K!ecophagy wenjpg<gh<hMl</("eating the environment").
• In 2004 he stated "I wish I had never used the term 'grey goo'."
What happen when the Gray goo washed over the city
Birth of Scanning Probe Microscopy
Gerd Binnig Heinrich Rohrer
For their design of the scanning tunnelling microscope
First Paper in 1982 ; Won the Nobel Prize = 1986
Dr/!-vqs<sm<!^<lzqDr.Richard Smalley “Rick”
Dr/wvqg<!covg<^<zvqe<!vsqge<
Dr/!-vqs<sm<!^<lzq 2:96.7
• gihe<!h<hg<gqOhit<!g{<Mhqch<H• Hx<XOfibiz<!yg<Omihv<!39!3116!z<!lv{l<• nlvqg<g osex<sjh -ujvogtvuh<hMk<Kukx<gig fOfiokipqEm<hk<kqe<!kf<jk we nxquqk<kK/!
The Lycurgus Cup represents one of the outstanding achievements of the
ancient glass industry
nh<hcbibqe<!fOfiuqR<Riek<kqe<!nh<hi biv<@
fOfiuqR<Riel<!we<xiz<!we<e@!
• ujvuqzg<g{l<• The study of materials and their behavior at the
level of particles measured in nanoscale• Hkiv<k<kr<gtqe<!-bz<HgjtBl<!nux<xqe<!fmkmjkg<Ogizr<gjgBl<!fOfintuqjmbigqb 2.211!nm -z<!gx<xOzfOfiuquqR<Riel</
eNehnjhopDl;gKk;
• ujvuqzg<g{l<• Understanding and control of matter at dimensions between
approximately 1 and 100 nanometers, where unique phenomena enable novel applications.
• 1-100 nm ntuqjmbqz<!njlf<kdVujlh<Hg<gjgg<ogi{<M ns<sqX ntuignjlBl<!OhiK outqh<hMl<!sqxh<Hh<!h{<Hgjgg<!ogi{<M Ng<gh<hMl<!gVuqgTl<!nh<ohiVm<gjgh<!hbe<hMk<Kl<!Fm<huqbZl<!eNehnjhopDl;gk; vdg;gLk;.
fOfih<hkiv<k<kl<)nanomaterial*!we<xiz<!we<e@!
• A material that exhibits distinct properties when studied on the order of less than 100 nm.
• hkiv<k<kr<gtqe<!hvqli{l<!2.211!nmntuqjmbqz<!njlBl<!OhiK nKfOfih<hkiv<k<kl<!weh<hMl</
Size dependent properties
fOfih<hkiv<k<kr<gjt kbivqk<kz<Synthesis of nanomaterials
• -v{<Muqklie n[GLjxgt<
• OlzqVf<K.gQp<n[GLjx)top down approach*• gQpqVf<K.Olz<!n[GLjx)bottom to top approach)
OlzqVf<K.gQp<n[GLjx)top down approach*
• hkiv<k<kr<gtqe<!hvqli{k<jk nke<!ohvqbdVh<hcbqzqVf<K kbivqk<kz<
gQpqVf<K.Olz<!n[GLjx)bottom to top approach)
• Hkiv<k<kr<gjt nux<xqe<!nch<hjmnzgqzqVf<K kbivqk<kz<
Basic unite
fOfi ntuqjms<sqxh<hqbz<Hgt<)Properties at nanoscale)
• Chemical Properties (-vsibe -bz<Hgt<*
• Electrical Properties (lqe<!-bz<Hgt<*!• Electronic Properties (<-zk<kqveqbz<!-bz<Hgt<*!• Optical Properties (ytqbqbz<!-bz<Hgt<*!• Mechanical Properties (ohtkQg -bz<Hgt<*!
ohVl<K{qg<jgBl<!fOfiK{qg<jgBl<)Bulk and nano)
• yOvgeutUg<gie Olx<hvh<hqe<!hvh<htUfOfiK{qg<jggTg<G nkqgliGl</!
sg<kqh<hm<jm ogit<jg)Band theory)
• dOzigh<hqj{h<H• dOzigolie<xqe<!fqxl<!!sg<kqh<hm<jmogit<jg &zl<!uqtg<gzil<
giuzq Gjxgmk<kq gmk<kqsg<kqh<hm<jm -jmoutq
Chemical Properties (-vsibe -bz<Hgt<*
• kig<guQkl<!nkqgvqg<Gl<!
fOfik<okiGkqgt<)nanosystems)
• -bx<jg fOfik<okiGkqgt< (Natural )• osbx<jg fOfik<okiGkqgt<!)Artificial )
-bx<jg fOfik<okiGkqgt<hz<zqbqe<!giz<gt<
hz<zqbqe<!giz<gt<
kiljv -jzLotus effect
DNA and Protein, not Cell
osbx<jg fOfik<okiGkqgt<