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Indian Institute of Science

1. Gaddam, Venkateswarlu. Synthesis and Characterization of 1D & 2D Nanostructures : Performance Study for Nanogenerators and Sensors.

Degree: 2015, Indian Institute of Science

Recently, efforts have been made for self-powering the batteries and portable electronic devices by piezoelectric nanogenerators. The piezoelectric nanogenerators can work as a power source for nano-systems and also as an active sensor. The piezoelectric nanogenerator is a device that converts random mechanical energy into electrical energy by utilizing the semiconducting and piezoelectric properties. Also, the mechanical energy is always available in and around us for powering these nano devices. The aim of the present thesis work is to explore 1D and 2D ZnO nanostructures (nanorods and nanosheets) on metal alloy substrates for the development of piezoelectric nanogenerators in energy harvesting and sensors applications. Hydrothermal synthesis method was adopted for the growth of ZnO nanostructures. The nanogenerators were fabricated by using the optimized synthesis parameters and subsequently studied their performance for power generation and as an active speed sensor. These 1D and 2D nanostructures based nanogenerators have opened up a new window for the energy harvesting applications and sensors development. The thesis is divided into following six chapters. Chapter 1: This chapter gives a general introduction about energy harvesting devices such as nanogenerators, available energy sources, mechanical energy harvesting, ZnO material and the details on hydrothermal synthesis process. A brief literature survey on different applications of piezoelectric nanogenerators is also included. Chapter 2: A novel flexible metal alloy (Phynox) and its properties along with its applications are discussed in this chapter. Details on the synthesis of 1D ZnO nanorods on Phynox alloy substrate by hydrothermal method are presented. Further, the optimization of parameters such as growth temperature, seed layer annealing and substrate temperature effects on the synthesis of ZnO nanorods are discussed in detail. As-synthesized ZnO nanorods have been characterized using XRD, FE-SEM, TEM and XPS. Chapter 3: It reports on the fabrication of piezoelectric nanogenerator on Phynox alloy substrate as power generating device by harvesting the mechanical energy. Initially, the performance of the nanogenerator for power generation due to finger tip impacts was studied and subsequently its switching polarity test was also carried out. Output voltage measurements were carried out using the in-house developed experimental setup. Stability test was also carried out to see the robustness of the nanogenerator. Finally, the output voltage response of the nanogenerator was studied for its use as an active speed sensor. Chapter 4: Synthesis of Al doped 2D ZnO nanorsheets on Aluminum alloy (AA-6061) substrate by hydrothermal method is reported in this chapter. The optimized parameters such as growth temperature and growth time effects on the synthesis of ZnO nanosheets are discussed. As-synthesized ZnO nanosheets were characterized using XRD, FE-SEM, TEM and XPS. The Al doping in ZnO is confirmed by EDXS and XPS analysis. Chapter 5: Cost… Advisors/Committee Members: Rajanna, K.

Subjects/Keywords: 1D & 2D Nanostructures; Zinc Oxide Nanostructures (ZNO); Metal Alloy Substrates; Piezollectric Nanogenerators; ZnO Nanosheets; ZnO Nanorods; Phynox Alloy Substrate; Al Alloy Substrate; Instrumentation and Applied Physics

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APA (6th Edition):

Gaddam, V. (2015). Synthesis and Characterization of 1D & 2D Nanostructures : Performance Study for Nanogenerators and Sensors. (Thesis). Indian Institute of Science. Retrieved from http://etd.iisc.ernet.in/2005/3885 ; http://etd.iisc.ernet.in/abstracts/4759/G27282-Abs.pdf

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Gaddam, Venkateswarlu. “Synthesis and Characterization of 1D & 2D Nanostructures : Performance Study for Nanogenerators and Sensors.” 2015. Thesis, Indian Institute of Science. Accessed October 23, 2019. http://etd.iisc.ernet.in/2005/3885 ; http://etd.iisc.ernet.in/abstracts/4759/G27282-Abs.pdf.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Gaddam, Venkateswarlu. “Synthesis and Characterization of 1D & 2D Nanostructures : Performance Study for Nanogenerators and Sensors.” 2015. Web. 23 Oct 2019.

Vancouver:

Gaddam V. Synthesis and Characterization of 1D & 2D Nanostructures : Performance Study for Nanogenerators and Sensors. [Internet] [Thesis]. Indian Institute of Science; 2015. [cited 2019 Oct 23]. Available from: http://etd.iisc.ernet.in/2005/3885 ; http://etd.iisc.ernet.in/abstracts/4759/G27282-Abs.pdf.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Gaddam V. Synthesis and Characterization of 1D & 2D Nanostructures : Performance Study for Nanogenerators and Sensors. [Thesis]. Indian Institute of Science; 2015. Available from: http://etd.iisc.ernet.in/2005/3885 ; http://etd.iisc.ernet.in/abstracts/4759/G27282-Abs.pdf

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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