Oral Characterisation of Porous Silicon Nanowires (PSiNWr) Film Elaborated and Modified by Organic Species
In The last years, nanostructures of materials, as the porous silicon nanowires (PSiNWs), have been used extensively studiedfor the development of several chemical, electro-chemical and biologic sensors, because of their physical and chemicalcharacteristics. The PSiNWs present a unique property, like the biocompatibility and the multifunctional. The PSiNWs canbe elaborated from lightly n-type (100) silicon substrate by Ag assisted chemical etching method. The obtained surfaces weregrafted with organic functional groups; first, we proceed by the grafting of acid monolayer on hydrogenated PSiNWs surfaceby hydrosylilation reaction to form Si-C covalent bond. Then, a reactive ester is generated from the terminal acid groups andsubsequently this activated surface is coupled with peptide containing amines by the formation of amide bond. This strategyis based on that used for the immobilization of biomolecules (DNA, proteins, antibodies ...) to elaborate biosensors [1-3]. Ateach step of the modification, the resulting surfaces were characterized by X-ray photoelectron spectroscopy (XPS). Differentcharacterization techniques were used to investigate the resulting nanostructures, such as SEM, XPS, FTIR and electrochemicalmeasurements.Finally, the obtained results can find application in low-cost and high efficiency porous silicon nanowires based applicationswere envisaged in environmental area. The obtained hybrid structure was tested as probe electrode to the electrochemicaldetection of mercury in solution.
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).