Fig. 5
From: Recent Advances in Silicon Nanowire Biosensors: Synthesis Methods, Properties, and Applications
a Bottom–up approach synthesis of SiNWs. (i) Phase diagram for Fe–Si binary system. (ii) Schematic diagram showing synthesis of SiNWs via VLS growth and laser ablation cluster formation method. (iii) Growth profile for the synthesis of SiNWs. b TEM image of SiNWs synthesized through bottom–up approach using VLS techniques. c SEM image of SiNWs method via top–down approach. These figures were reproduced from [39] and [40]