11 O and Zn 1- x Co x O NWs. (a) Magnetization as

a function of applied field at 2 K for as-implanted (squares), argon-annealed (circles), and vacuum-annealed (triangles) Zn0.89Co0.11O NWs. (b) Magnetization as a function of applied field at 2 K for argon-annealed Zn1-x Co x O NWs. Reprinted with permission from Jian et al. [58]. Wu et al. [61] reported on room-temperature ferromagnetism of Mn+-implanted Si nanowires. Figure 12 shows magnetization as a function of applied field for Si nanowires implanted with different fluences. Figure 12a shows that saturation magnetization increased with increasing Mn ion concentration. This phenomenon reveals that the magnetic moments’ long-range ferromagnetic coupling is related to the Mn concentration. Figure 12b shows that the hysteresis loops and saturation magnetization increase with the reduction of temperature. Pure Si nanowires are diamagnetic, and all of the manganese silicide phases are not ferromagnetism. selleck products However, Mn-implanted Si nanowires reveal a room-temperature ferromagnetism that this website can

be attributed to the long-range ferromagnetic coupling that occurred between electrons and Mn atoms. Figure 12 Hysteresis loops measure at various temperatures. Hysteresis loops (a) measured at 10 K for Si nanowires Mn+-implanted to doses of 1 × 1015, 5 × 1015, 1 × 1016, and 2 × 1016 cm-2 and (b) taken at 10, 77, and 300 K for Si nanowires Mn+-implanted to a dose of 2 × 1016 cm-2. Reprinted with permission from Wu et al. [61]. GaAs [62] and GaN [63, 64] as III-IV semiconductors have excellent properties to fabricate DMS; TM-implanted GaN has a high Tc (≧300 K) [53]. So far, the origin of room-temperature ferromagnetism of the TM-implanted DMS was not clear. The low repeatability of room-temperature ferromagnetic semiconductors is another problem. Nitrogen-implanted single cadmium sulfide nanobelt Cadmium sulfide (or CdS) is a representative wide-bandgap

II-VI semiconductor; its bandgap is 2.42 eV at room temperature. Cadmium sulfide has been extensively applied to fabricate optical cavities, waveguides, lasers, and solar cells. Many research on ion-implanted CdS film were reported substantially, and most of these research discussed the optical property of CdS films. In spite of this, papers reporting about CdS check details nanobelts were quite a few; ion-implanted single CdS nanobelts have seldom been researched. From Etofibrate this perspective, we studied the optical property of the N+ ion-implanted single CdS nanobelts and expected that the energy band structure of the CdS nanobelts could be transformed by ion implantation. Different from previous reports, the selected CdS nanobelts were marked by an Au marker; by this, it means that property variation process of the marked CdS nanobelts can be recorded. The CdS nanobelts were acquired by thermal evaporation process; the CdS powers were evaporated at 850°C in a tube furnace with Au as the catalyst on the silicon substrate.