Out of the six strategies mentioned above, the growth-directed process through the use of template is one of the simplest and preferred strategies to produce 1D nanostructures. This method is relatively straightforward as the template serves as a scaffold within or around which a different material can be generated in situ, and shaped into a 1D nanostructure with the morphology complementary to the template used . Among the different template synthesis strategies, the most successful methods are the step edges , channels in porous material [7,8], self-assembled molecular structures , and templating against existing nanostructures . The synthesis of 1D nanostructures inside the channel of porous materials were pioneered by Huczko, Martin, and several others [7,8]. In this method, the porous material (template) serves as a scaffold in which the desired 1D nanostructures are deposited in situ inside the channel. The different porous templates that have been employed in the past include anodized alumina oxide (AAO) [8,11], radiation track etch polymer membrane (Polycarbonate) , nanochannel glass , mica , mesoporous silica , and block copolymers . As shown in Fig. 1, the mechanism of filling the template can be performed using techniques such as electrodeposition , sol–gel , chemical vapor deposition , and pressure injection method . In all of these cases, the 1D nanostructure shape, structure, and morphology is complementary of the template. In addition, the properties of these nanostructures are also directly related to the template properties such as channel dimensions, relative channel orientation, channel size distribution, and channel surface roughness. These methods are known for their simplicity, high-throughput, and cost effectiveness, which allows for complex topology present on surface of the template to be formed in single additive step. The major drawback of these methods especially electrodeposition is that the 1D nanostructures are usually polycrystalline and the quantities produced in each run is limited . It is also worth mentioning here that it is possible to synthesize single-crystalline 1D nanostructures using template method by employing tight process control .