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SUMMARY:Self-Assembled DNA Nanosystems for Energy and Electron Transfer Ap
 plications - Professor Bo Albinsson\, Chalmers University of Technology
DTSTART:20151110T143000Z
DTEND:20151110T153000Z
UID:TALK60886@talks.cam.ac.uk
CONTACT:Stuart Higgins
DESCRIPTION:DNA has the possibility to self-assemble into predefined 2 and
  3-dimensional objects\, with a spatial resolution on the sub-nm level.(1)
  The DNA constructs can easily be made with compositions and shapes define
 d at the atomic level in molar amounts in bulk phase\, as compared to norm
 al lithographic techniques in which objects are made one by one with much 
 lower spatial resolution. These features have made DNA an interesting buil
 ding block in bottom-up nanotechnology.\nIn this presentation I will descr
 ibe how we systematically have developed 1 and 2-dimensional DNA construct
 s for the precise positioning of components involved in photoinduced elect
 ron transfer reactions.(2\,3) Linear and branched DNA molecules have been 
 functionalized with lipophilic porphyrins that act as anchors in liposomes
  and on supported membranes.(4\,5) The porphyrin anchors\, furthermore\, u
 ndergo photoinduced electron transfer reactions with electron acceptors th
 at reside in the membrane. The DNA\, which resides in the water phase\, ca
 n in turn act as a scaffold for antennas undergoing multi-step energy tran
 sfer reactions.(6-8) With this flexible approach we can self-assemble a wi
 de variety of complex energy transfer and redox components with the aim to
  produce a predetermined molecular pattern forming the basis for novel lit
 hographic applications.\n\nReferences\n(1) Seeman\, N. C. Annu. Rev. Bioch
 em.. 79 (2010) 65-87.\n(2) Börjesson\, K.\; Tumpane\, J.\; Ljungdahl\, T.
 \; Wilhelmsson\, L. M.\; Nordén\, B.\; Brown\, T.\; Mårtensson\, J.\; Al
 binsson\, B. J. Am. Chem. Soc. 131 (2009) 2831-2839.\n(3) Börjesson\, K.\
 ; Wiberg\, J.\; El-Sagheer\, A. H.\; Ljungdahl\, T.\; Mårtensson\, J.\; B
 rown\, T.\; Nordén\, B.\; Albinsson\, B. ACS Nano 4 (2010) 5037-5046.\n(4
 ) Woller\, J. G.\; Börjesson\, K.\; Svedhem\, S.\; Albinsson\, B. Langmui
 r 28 (2012) 1944-1953.\n(5) Börjesson\, K.\; Lundberg\, E. P.\; Woller\, 
 J. G.\; Nordén\, B.\; Albinsson\, B. Angew. Chem. Int. Ed. 50 (2011) 8312
 -8315.\n(6) Albinsson\, B. Nature Chem. 3 (2011) 269-270.\n(7) Hannestad\,
  J. K.\; Sandin\, P.\; Albinsson\, B. J. Am. Chem. Soc. 130 (2008) 15889-1
 5895.\n(8) Woller\, J. G.\; Hannestad\, J. K.\; Albinsson\, B. J. Am. Chem
 . Soc. 135 (2013) 2759-2768.\n(9) Börjesson\, K.\; Woller\, J. G.\; Parsa
 \, E.\; Mårtensson\, J.\; Albinsson\, B. Chem. Commun. 48 (2012) 1793-179
 5.
LOCATION:Kapitza Building Seminar Room\, Cavendish Laboratory\, Department
  of Physics
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