Phys Rev B 2009, 79:125437(7).CrossRef 21. Cahen D, Kahn A: Electron energetics at surfaces and interfaces: concepts and experiments. Adv Mater 2003, 15:271–277.CrossRef FK506 22. Johansson LI, Owman F, Martensson P:

Martensson per, high-resolution core-level study of 6H-SiC(0001). Phys Rev B 1996, 53:13793–13802.CrossRef Competing interests The authors declare that they have no competing interests. Authors’ contributions ML participated in overall experiments. KK conducted HRPES experiments, and HL who is a corresponding author participated in overall experiments. All authors read and approved the final manuscript.”
“Background Excellent high refractive index materials are demanded by recent rapid development of mobile devices, solar cells, and luminescent devices. Various materials have been developed by hybridization of organic and selleck chemical inorganic materials, complementing the properties of each component. For example, organic materials provide flexibility and easy Selleck SP600125 processing, and inorganic materials provide optical and mechanical properties. Typical preparation methods for organic–inorganic hybrids are incorporation

of metal oxide into polymer matrices via sol–gel methods [1–3] and mixing of polymers and nanoparticles of metal oxides [3–8] or sulfides [9, 10]. However, both of the methods contain some disadvantages. Sol–gel methods realized facile and green procedures but are typically time consuming and PRKD3 accompanied by shrinkage during drying processes. Mixing of nano-scaled metal compounds is advantageous by the fast process, but specific coating and precise tuning of the reaction conditions are required for the preparation of nano-scaled metal compounds. Another approach to conquer these problems is the use of organometallic materials [11]. Ene-thiol polyaddition of dithiols with tetravinyl-silane, germane, and tin gave polymers with high refractive indexes ranging from 1.590 to 1.703 and excellent physical properties. Encouraged by this work, we designed new organic–inorganic hybrid materials

based on sulfur as a bridge for organic and inorganic components, namely organic-sulfur-inorganic hybrid materials. The important character of sulfur for this approach is the ability to form stable linkages with both organic and inorganic structures. Another beneficial character of sulfur is its high atom refraction, by which sulfur has served as an important component for optical materials [12–17]. This bridging ability has been mostly applied for the functionalization of inorganic surfaces with organic structures such as the modification of gold surface [18–20] and quantum dots [21, 22] with thiols. Although many stable metal thiolates have been reported [23–27], these compounds have not been applied as optical materials as far as we know. As the metal for this approach, zinc was selected because of its high refractivity and low toxicity.