Optical properties of hybrid T3Pyr/SiO2/3C-SiC nanowires

Abstract

A new class of nanostructured hybrid materials is developed by direct grafting of a model thiophene-based organic dye on the surface of 3C-SiC/SiO2 core/shell nanowires. TEM-EDX analysis reveals that the carbon distribution is more spread than it would be, considering only the SiC core size, suggesting a main contribution from C of the oligothiophene framework. Further, the sulfur signal found along the treated wires is not detected in the as-grown samples. In addition, the fluorescent spectra are similar for the functionalized nanostructures and T3Pyr in solution, confirming homogeneous molecule grafting on the nanowire surface. Chemical and luminescence characterizations confirm a homogeneous functionalization of the nanowires. In particular, the fluorophore retains its optical properties after functionalization.

Deformation-induced phase transformation in 4H–SiC nanopillars

“…Silicon carbide (SiC) is a particularly important and interesting material since it has over 200 crystalline polytypic structures with common structural units of face-centred cubic zinc blende (ZB), hexagonal close-packed wurtzite (WZ) and rhombohedral structures [1]. Among these polytypes, the 4H-SiC structure with a bandgap of $3.2 eV possesses favourable electrical properties, including high electron mobility [3,4], making SiC an attractive candidate for "green energy" components in high-power electronic applications because of the potential for saving electric power and reducing CO 2 emission [5][6][7][8][9][10]. The mechanical behaviour of semiconductor materials is an important topic since the performance (such as functionality and reliability) of electronic devices strongly depends on their mechanical properties [11][12][13][14][15][16][17].…”

Cytocompatibility and Cellular Internalization Mechanisms of SiC/SiO2Nanowires

“…35 They present a crystalline cubic core and an amorphous shell that result in an enhanced optical emission from SiC, 36 which matches well the absorption bands of organic photosensitizers and make the nanosystem very attractive as photosensitizer for biosensing applications. Further, because the SiO 2 shell allows easy functionalization via wet chemistry procedures, 37 the SiC/SiO 2 NWs can be easily functionalized with organic molecules as well as with inorganic crystals 38 in view of chemi-biosensing applications as well as of photodynamic therapy. In summary, the nanosystem presents a double functionality that makes it very attractive, provided its biocompatibility also is demonstrated.…”

Porphyrin conjugated SiC/SiOx nanowires for X-ray-excited photodynamic therapy

“…This nanosystem presents an optical emission spectrum12 which matches well the absorption bands of many organic photosensitizers and can be easily functionalized with inorganic crystals as well as with organic molecules1314.…”