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Inorganic Nanocrystals with Dendrimer Templates: Mesoscopic Model System and Route to New Nanocomposites

  • Franziska Gröhn (a1), Barry J. Bauer (a1) and Eric J. Amis (a1)

Abstract

We investigate nanostructures that are formed when dendrimers act as hosts. Poly(amidoamine) (PAMAM) dendrimers can be used as templates for inorganic nanocrystals, both in aqueous solution1-3 and in a polymeric matrix4. SANS, SAXS and TEM are used to characterize the resulting hybrid structures. Different inorganic colloids like noble metal and cadmium sulfide colloids are studied1,2. With increasing dendrimer generation, we observe a transition from low molecular colloid stabilizing to an effective polymer templating in terms of a “host-guest nanoscale synthesis”. For these higher generation dendrimers, inorganic colloids are formed inside single dendrimer molecules and the size of the nanocrystal can precisely be controlled by the dendrimer generation (“fixed loading law”). Hydrophobically modified dendrimers in organic solvent represent a further, different kind of host system that we have investigated using scattering methods5.

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[1] Gröhn, F.; Bauer, B.J.; Akpalu, Y.A.; Jackson, C.L.; Amis, E.J.; Macromolecules, 2000, 33, 6042.
[2] Gröhn, F.; Bauer, B.J.; Amis, E.J.; ACS Polymer Preprints 2000, 41, 560.
[3] Gröhn, F.; Bauer, B.J.; Amis, E.J.; MRS Conference Proceedings 2000, 628, CC2.7.
[4] Gröhn, F.; Bauer, B.J.; Amis, E.J.; Macromolecules, 2001, 34, 2179.
[5] Gröhn, F.; Bauer, B.J.; Amis, E.J.; Macromolecules 2001, submitted.
[6] Antonietti, M.; Göltner, C.; Angew. Chem Int. Eng. Ed. 1997, 36, 910.
[7] Antonietti, M.; Gröhn, F.; Hartmann, J.; Bronstein, L.; Angew. Chem Int. Eng. Ed. 1997, 36, 2080. Y1.2.11
[8] Jansen, J. F. G. A.; deBrabander-van den Berg, E. M. M.; Meijer, E.W.; Science 1994, 266, 1226.
[9] Zhao, M.; Sun, L.; Crooks, R. M.; J. Am. Chem. Soc. 1998, 120, 4877.
[10] Esumi, K.; Suzuki, A.; Aihara, N.; Usui, K.; Torigoe, K.; Langmuir 1998, 14, 3157.
[11] Balogh, L.; Tomalia, D.A.; J. Am. Chem. Soc. 1998, 120, 7355.
[12] Sooklal, K.; Hanus, L.H.; Ploehn, H.J.; Murphy, C.J.; Advan. Mater. 1998, 10, 1083.
[13] Zhao, M.Q.; Crooks, R.M.; Angew. Chem Int. Eng. Ed. 1999, 38, 364.
[14] Beck Tan, N.C.; Balogh, L.; Trevino, S.F.; Tomalia, D.A.; Lin, J.S.; Polymer 1999, 40, 2537.
[15] Zhao, M.; Crooks, R.M.; Adv. Mat. 1999, 11, 217.
[16] Garcia, M.E.; Baker, L.A.; Crooks, R.M.; Anal. Chem. 1999, 71, 256.
[17] Zhao, M.; Crooks, R.M.; Chem. Mat. 1999, 11, 3379.
[18] Esumi, K.; Suzuki, A.; Yamahira, A.; Torigoe, K.; Langmuir 2000, 16, 2604.
[19] Esumi, K.; Hosoya, T.; Suzuki, A.; Yamahira, A.; Torigoe, K.; Langmuir 2000, 16, 2978.
[20] Certain commercial materials and equipment are identified in this article in order to specify adequately the experimental procedure. In no case does such identification imply recommendation by the National Institute of Standards and Technology, nor does it imply that the material or equipment identified is necessarily the best available for this purpose.
[21] deBrabander-van den Berg, E.M.M.; Meijer, E.W.; Angew. Chem. 1993, 105, 1370.
[22] Glinka, C.; Barker, J.G., Hammouda, B.; Krueger, S.; Moyer, J.J.; Orts, W.J.; J. Appl. Cryst. 1998, 31, 430.
[23] Hsiau, B.S.; Chu, B.; Yeh, F.; NSLS Newsletter 1997, July1.
[24] Glatter, O.; Acta Phys. Austriaca 1977, 47, 83.
[25] Glatter, O.; J. Appl. Cryst. 1977, 10, 415.
[26] Glatter, O.; J. Appl. Cryst. 1980, 13, 7 and 577.
[27] Error bars are the measured standard deviation in I(q)
[28] The relative standard deviation in the SAXS intensity values in the range 0.2 nm-1 < q < 1.6 nm-1 is less than 3 %. At higher wavevectors, the relative standard deviation increases with q to a maximum value of 7 %.
[29] The relative standard deviation in the P(r) values is less than 3 %.
[30] Balogh, L.; presented at Particles 2001, Conference Orlando 2001.
[31] Gröhn, F.; Bauer, B.J.; Amis, E.J.; Manuscript in preparation.
[32] Breulmann, M.; Cölfen, H.; Hentze, H.P.; Antonietti, M.; Walsh, D.; Mann, S.; Adv. Mat. 1998, 10, 237.
[33] Bauer, B.J.; Prosa, T.J.; Kim, G.; Jackson, C.L.; Liu, D.W.; Amis, E.J.; in preparation.
[34] Scattering curves were shifted in order to allow for a better comparison and thus do not represent absolute intensities in this plot. The relative standard deviation in the SAXS intensity values for q < 1.5 nm-1 is less than 1%. At higher wavevectors, the relative standard deviation increases with q to a maximum value of 15 %.
[35] Bosman, A.W.; Janssen, H.M.; Meijer, E.W.; Chem. Rev. 1999, 99, 1665.
[36] Schenning, A.P.H.J.; Elissen-Roman, C.; Weener, J.W.; Baars, M.W.P.L.; vander Gast, S.J.; Meijer, E.W.; J. Am. Chem. Soc. 1998, 120, 8199.
[37] Baars, M.W.P.L.; Söntgens, S.H.M.; Fischer, H.M.; Peerlings, H.W.I.,; Meijer, E.W.; Chem. Eur. J. 1998, 4, 2456.

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Inorganic Nanocrystals with Dendrimer Templates: Mesoscopic Model System and Route to New Nanocomposites

  • Franziska Gröhn (a1), Barry J. Bauer (a1) and Eric J. Amis (a1)

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