caa a22 4500 475763513 CHVBK 20180406123558.0 cr unu---uuuuu 170329e20000601xx s 000 0 eng 10.1007/s003960050560 doi (NATIONALLICENCE)springer-10.1007/s003960050560 Observation of nanoparticles and film formation by scanning tunneling microscopy: methyl methacrylate/butyl methacrylate nanoparticles prepared by microemulsion polymerization [Elektronische Daten] [C. Koçum, M. H. Zareie, F. Özer, E. Pişkin]  Latexes as dispersions of poly(methyl methacrylate-co-butyl methacrylate) copolymeric nanoparticles within water were produced by microemulsion polymerization of the respective comonomers. Polymer yield, number-average and weight-average molecular weights, polydispersity index, and the glass-transition temperature of the copolymer produced were 50%, 8.8 × 104, 2.54 × 105, 2.87, and 45 °C. Scanning tunneling microscopy (STM) images of the latex nanoparticles and film formation on highly oriented pyrolitic graphite (HOPG) were obtained with a 2 V sample bias and a tunneling current of 20 pA. The STM pictures revealed that the particle size was 18 ± 3 nm. There was no film formation in the case of dehydration at room temperature. There was some coalesence of particles when the HOPG surface was preheated at 55 °C, while complete film formation was achieved when the latexes were annealed at 55 °C in an oven for about 10 min. Springer-Verlag Berlin Heidelberg, 2000 Key words Scanning tunneling microscopy nationallicence Latex nationallicence Nanoparticles nationallicence Film formation nationallicence Koçum C. Chemical Engineering Department and Bioengineering Division Hacettepe University, P.K. 716 Kizilay, 06420 Ankara, Turkey e-mail: piskin@hacettepe.edu.tr Tel.: +90-312-2977400 Fax: +90-312-2992124, TR aut Zareie M. H. Chemical Engineering Department and Bioengineering Division Hacettepe University, P.K. 716 Kizilay, 06420 Ankara, Turkey e-mail: piskin@hacettepe.edu.tr Tel.: +90-312-2977400 Fax: +90-312-2992124, TR aut Özer F. Chemical Engineering Department and Bioengineering Division Hacettepe University, P.K. 716 Kizilay, 06420 Ankara, Turkey e-mail: piskin@hacettepe.edu.tr Tel.: +90-312-2977400 Fax: +90-312-2992124, TR aut Pişkin E. Chemical Engineering Department and Bioengineering Division Hacettepe University, P.K. 716 Kizilay, 06420 Ankara, Turkey e-mail: piskin@hacettepe.edu.tr Tel.: +90-312-2977400 Fax: +90-312-2992124, TR aut https://doi.org/10.1007/s003960050560 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s003960050560 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Koçum C. Chemical Engineering Department and Bioengineering Division Hacettepe University, P.K. 716 Kizilay, 06420 Ankara, Turkey e-mail: piskin@hacettepe.edu.tr Tel.: +90-312-2977400 Fax: +90-312-2992124, TR aut NATIONALLICENCE 700 1- Zareie M. H. Chemical Engineering Department and Bioengineering Division Hacettepe University, P.K. 716 Kizilay, 06420 Ankara, Turkey e-mail: piskin@hacettepe.edu.tr Tel.: +90-312-2977400 Fax: +90-312-2992124, TR aut NATIONALLICENCE 700 1- Özer F. Chemical Engineering Department and Bioengineering Division Hacettepe University, P.K. 716 Kizilay, 06420 Ankara, Turkey e-mail: piskin@hacettepe.edu.tr Tel.: +90-312-2977400 Fax: +90-312-2992124, TR aut NATIONALLICENCE 700 1- Pişkin E. Chemical Engineering Department and Bioengineering Division Hacettepe University, P.K. 716 Kizilay, 06420 Ankara, Turkey e-mail: piskin@hacettepe.edu.tr Tel.: +90-312-2977400 Fax: +90-312-2992124, TR aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer