Nanomaterials and their Applications (ELEDSE8D) — DU B. Sc. (Hons) Electronics Previous Year Question Papers

Name of trie paper : Nanomaterials and their Applications (DSE) 1. (a) Describe the electr.ochemical methods of synthesizing conducting polymers. 3 How do they differ from chemical methods in terms of process and applications? (b) Differentiate between OD,1D,2D and 3D nanomaterials with suitable 3 (c) (d) State two advantages of supercapacitors over conventional batteries. 3 How can nanomaterial be used to optimize renewable ener.gy technologies like 3 solar cell? (e) How do nanomaterials enhance the perforlhance of rechargeable battery 3 (I) Explain how nanomaterials are useful for waste water treatment. 3 2 (a) How do nanoscale dimensions alter the behaviour of materials compared to 6 their bulk counterparts? Briefly explain the general reasons behind these changes. (b) Explain how the principle of quantum confinement in semiconductor 6 naoparticles makes quantum dot LEDs superior than conventional LEDs? (c) Why are diblock copolymers useful in nanocomposite preparartion? Do 6 nanocomposite often show enhanced mechanical strength compared to conventional composite? If yes, why? . 3. (a) .How does the chirality of CNT influence their properties and govern their 6 (b) What are nanoscale catalysts? How do they differ from conventional catalysts 6 in terms of surface area and reactivity? (c) What is the significance of the nanoscale in energy conversion? Why do 6 materials behave differently at the nanoscale compared to their bulk counterparts? Differentiate between direct and indirect energy conversion processes. 4. (a) Differentiate between primary and secondary batteries. Explain the, working of 6 Lithium-ion battery and also explain how the performance of the battery is enhancing with the introduction of nanomaterial. (b) Explain the role of nano-electrochemical systems in modem energy storage 6 system (ESS). List and briefly explain any three properties of nanomaterials that make them suitable for energy technology applications. (c) How are nanomaterials incorporated into membranes for water treatment? 6 Briefly explain the role of transport processes in nanomaterial-enhanced membrane technology. 5. (a) What is hydrogen Fuel. Why is its storage important? How is nanotechnology 6 useful in hydrogen storage. (b) Explain carbon nanotechnology and discuss the structure, properties, and applications of carbon, nanotubes (CNTs). (c) Explain the working principle of a solar cell. Describé the different types of 6 nanomaterials used in solar cells and discuss their effects on the efficiency and performance of solar cells. 6. (a) Explain the characteristics of gas sensors and describe the working principle of 6 Chemi resistive CNT based gas sensors. (b) Explain magnetic devices based on nanotechnology. Describe the principle of 6 operation of nanoscale magnetic devices such as spintronic devices or magnetic sensors, and discuss their applications in data storage, memory devices, and biomedical fields.