## 1 Introduction  
Since the report that polymers with conjugated backbone structures can become superconductors at room temperature, research on organic conductors has been extensively studied [1; 2; 3]. The structure of most conductive polymers has the characteristic of alternating single and double bonds, with the advantages of being able to control their electrical conductivity by doping and having an easy manufacturing process in thin film, powder, or in various nanostructures. The use of these conductive polymers includes electrode materials, static electricity removal, electromagnetic wave shielding and absorption, etc. Its great advantage is its very diverse workability which is lightweight and can be mass produced. However, since mechanical properties or thermal stability are insufficient in completely replacing metals or other materials, studies on manufacturing methods of various conducting polymer composites have been conducted to overcome this problem [4; 5]. In the case of metal or semiconductor nanoparticles, when the size is reduced to less than 100 nm, the optical, electrical, magnetic, and chemical properties of the existing material may change, or the properties may be significantly improved due to the maximized surface area and quantum effects. For example, inorganic quantum dots (QDs) such as CdSe, InP, perovskite CsPbX3, etc., are considered promising semiconductor nanoparticles because they have unique optical and electronic properties due to quantum effects [6; 7; 8; 9]. Therefore, studies on the formation of heterojunctions using the unique physicochemical properties of these nanoparticles and, in particular, many attractive methods applicable to optoelectronic devices have been reported [10; 11; 12; 13; 14; 15; 16; 17]. Such heterojunctions can be formed by physical adsorption, growth on other nanostructures, electrostatic adsorption, and covalent bonding chemistry [18; 19; 20]. The optimal approach to form the maximum possible interface between two nanostructured materials is to embed one in another. Using this method, many researchers have fabricated various types of heterogeneous nanostructures using advanced technologies such as chemical vapor deposition (CVD) [21], atomic layer deposition (ALD) [22; 23], electron-beam lithography (EBL) [24], and solution synthetic methods [25; 26; 27]. Previous studies focused primarily on the formation of the composite structure itself, and there remains room for improvement by controlling the shapes and dimensions of the hybrid nanostructures. [PERSON] et al. fabricated a composite nanowire of CdSe nanocrystal rod and poly(3-hexylthiophene) and applied it to photovoltaic devices. In manufacturing nanocomposite wires, they used a method of growing into nanowires by synthesis of a polymer material, but there were disadvantages in the difficulty to adjust the length of the nanowires and control the diameter [28]. [PERSON] et al. have produced nano-patterned hybrid nanostructures by e-beam lithography and plasmon-assisted polymerization and observed enhanced optoelectronic properties; however, the materials' generality and scalability of this process present significant questions about its suitability to industry scale [29]. In this study, we describe an effective synthetic pathway based upon template electropolymerization to produce conducting polymer nanorods in which optically active quantum dots are embedded (Figure 1). Templated electropolymerization is renowned for the high throughput synthesis of conducting polymer nanostructures whose dimensions are confined in well-defined porous membranes. Anodic aluminum oxide (AAO) membranes have been widely used for this purpose owing to their vertically aligned, close-packed uniform nanopores whose diameters can be controlled from tens to hundreds of nanometers [30; 31; 32; 33].