AI Article Synopsis

  • Hydrosilylation is a popular technique for altering silicon surface chemistry that effectively passivates surface sites and introduces various functionalities.
  • The study focuses on using radical initiators like 2,2'-azobis(2-methylpropionitrile) and benzoyl peroxide for hydrosilylation of silicon nanocrystals, highlighting advantages like low temperature requirements and independence from particle size.
  • Results show that different functional groups such as alkenes, alkynes, carboxylic acids, and esters can be successfully introduced, leading to well-passivated monolayer surfaces.

Article Abstract

Hydrosilylation is among the most common methods used for modifying silicon surface chemistry. It provides a wide range of surface functionalities and effective passivation of surface sites. Herein, we report a systematic study of radical initiated hydrosilylation of silicon nanocrystal (SiNC) surfaces using two common radical initiators (i.e., 2,2'-azobis(2-methylpropionitrile) and benzoyl peroxide). Compared to other widely applied hydrosilylation methods (e.g., thermal, photochemical, and catalytic), the radical initiator based approach is particle size independent, requires comparatively low reaction temperatures, and yields monolayer surface passivation after short reaction times. The effects of differing functional groups (i.e., alkene, alkyne, carboxylic acid, and ester) on the radical initiated hydrosilylation are also explored. The results indicate functionalization occurs and results in the formation of monolayer passivated surfaces.

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Source
http://dx.doi.org/10.1021/acs.langmuir.5b02307DOI Listing

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