Homogeneous surface deposition of molecules over a large area of the substrate is difficult to achieve but extremely important for proposed applications of magnetic molecules in data storage,information processing or ...Homogeneous surface deposition of molecules over a large area of the substrate is difficult to achieve but extremely important for proposed applications of magnetic molecules in data storage,information processing or molecular spintronics.In this paper we report a simple method for large area surface functionalization with the aim of grafting complex molecules in an organized manner.A proof of concept is given by grafting the complexes[Ln_(2)(SYML)_(3)(H_(2)O)](1 Ln=Eu(Ⅲ),2 Ln=Dy(Ⅲ))on the functionalized Si(100)and using a combination of techniques,including luminescence to track the process.We obtain a homogenous coverage of Si(100)wafers(from 0.5 cm×0.5 cm to 1 cm×1 cm)with complexes 1 and 2.Time of flight secondary ion mass spectroscopy(ToF-SIMS)confirms the presence of the expected mole-cular fragments on the surface.Grazing incidence X-Ray diffraction(GIXRD)measurements show pre-ferred orientations and ordered domains of the molecules.The magnetic properties and anisotropy of the monolayer of grafted molecules are examined by X-Ray magnetic circular dichroism(XMCD),showing a fraction of molecules with a preferred orientation of their easy axis of magnetization at 30°with respect to the surface-normal.展开更多
基金support from the Spanish Government Ministerio de Ciencia Innovación y Universidades(project PGC2018-098630-B-I00 and PhD fellowship FPI PRE2019-087801 to GGR)support from CSIC and Ministerio de Ciencia,Innovación y Universidades(projects 201060E013 and 202160E030)+2 种基金support from the Spanish Government Ministerio de Ciencia Innovación y Universidades(PGC2018-093863-B-C21 and MDM-2017-0767)support from the Gobierno de Aragón(project RASMIA E12-20R).ECS,GG,and EB acknowledge beamtime use at ALBA BOREAS(project 2021075217)ESRF SpLine(project 25-02-964).
文摘Homogeneous surface deposition of molecules over a large area of the substrate is difficult to achieve but extremely important for proposed applications of magnetic molecules in data storage,information processing or molecular spintronics.In this paper we report a simple method for large area surface functionalization with the aim of grafting complex molecules in an organized manner.A proof of concept is given by grafting the complexes[Ln_(2)(SYML)_(3)(H_(2)O)](1 Ln=Eu(Ⅲ),2 Ln=Dy(Ⅲ))on the functionalized Si(100)and using a combination of techniques,including luminescence to track the process.We obtain a homogenous coverage of Si(100)wafers(from 0.5 cm×0.5 cm to 1 cm×1 cm)with complexes 1 and 2.Time of flight secondary ion mass spectroscopy(ToF-SIMS)confirms the presence of the expected mole-cular fragments on the surface.Grazing incidence X-Ray diffraction(GIXRD)measurements show pre-ferred orientations and ordered domains of the molecules.The magnetic properties and anisotropy of the monolayer of grafted molecules are examined by X-Ray magnetic circular dichroism(XMCD),showing a fraction of molecules with a preferred orientation of their easy axis of magnetization at 30°with respect to the surface-normal.
