Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Preparation of monolayers of [MnIII6CrIII]3+ singlemolecule magnets on HOPG, mica and silicon surfaces and characterization by means of noncontact AFM | Gryzia et al. Nanoscale Research Letters 2011 6 486 http content 6 1 486 o Nanoscale Research Letters a SpringerOpen Journal NANO EXPRESS Open Access Preparation of monolayers of MnIII6CrIII 3 singlemolecule magnets on HOPG mica and silicon surfaces and characterization by means of noncontact AFM 1 1 1 2 2 3 Aaron Gryzia Hans Predatsch Armin Brechling Veronika Hoeke Erich Krickemeyer Christine Derks Manfred Neumann3 Thorsten Glaser2 and Ulrich Heinzmann 1 Abstract We report on the characterization of various salts of MnIII6CrIII 3 complexes prepared on substrates such as highly oriented pyrolytic graphite HOPG mica SiO2 and Si3N4. MnIII6CrIII 3 is a single-molecule magnet . a superparamagnetic molecule with a blocking temperature around 2 K. The three positive charges of MnIII6CrIII 3 were electrically neutralized by use of various anions such as tetraphenylborate BPh4- lactate C3H5O3- or perchlorate ClO4- . The molecule was prepared on the substrates out of solution using the droplet technique. The main subject of investigation was how the anions and substrates influence the emerging surface topology during and after the preparation. Regarding HOPG and SiO2 flat island-like and hemispheric-shaped structures were created. We observed a strong correlation between the electronic properties of the substrate and the analyzed structures especially in the case of mica where we observed a gradient in the analyzed structures across the surface. Introduction Current technology demands the development of smaller devices in various fields. The next step necessary involves reducing small bulk objects down the scale to where a single molecule has a specific task. Mn in this context is an element widely used in manipulating magnetic properties of molecules 1-5 hence we developed talent-Bu2 MnnI3 2 CrnI CN 6 3 Mnni6Crnl 3 with H6talent-Bu2 2 4 6-tris 1- 2- 3 5-di-tert-butylsalicylaldi-mino -2-methylpropylimino -ethyl -1 3 5-trihydroxyben-zene 6-9 . .
