Chapter 8, Problem 8.13DOEP

2. In lithography process, you are asked to deposit nanoparticle in holes. Select the process steps in order. Resist A metal elching Substrate After development SHiping Nanomaterial of resist deposited in holes wetChem cal) (a) Striping resist Deposition of nanomaterial -Etching (b) Etching - Deposition of nanomaterial Striping resist (c) Deposition of nanomaterial- Striping resist Etching Cmone

4. Poly-Si of the following structure is to be etched using a completely anisotropic dry-etch process, to remove poly-Si at a rate of 0.1 mm /min. However, this etching process has poor selectivities: selectivity to SiO₂ is 5; selectivity to photoresist is 2. (a) Sketch the cross-section after 5 minutes of etching. (b) Calculate the angle of the SiO₂ sidewalls after 5 minutes of etching. 0.lum oxide 1 um 0.7um Poly-Si I photoresist 0.5 um

How many nanostructured dimensions does a C nanotube have? Does a C nanotube with its nanostructured dimensions always have the same properties? If not, explain what the electrical conductivity properties in a nanotube depend on?

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Create an open ended question about processing nanomaterials with answer

a) What is the continuum assumption, and when does the continuum assumption break down? b) Define the Knudsen number, and what is its physical significance? c) What are the unique issues related to microfluidics? d) What are the applications of microfluidics?

e) What are called semi-conductor ? What are the Characteristics of Semiconductors? Give any two application of semi-conductor? What are called bio materials and Write any two applications of Bio materials?

Magnetic resonance imaging (MRI) is a medical imaging technique that located in hospitals and radiology centers. MRI uses a strong magnetic field and radio waves to create detailed images of the organs and tissues within the body. (i) MRI system operators must make sure not to carry any metallic objects when they enter the room that house the MRI, even when the machine is not operating. Give the reason. (ii) What happens if a magnet was hitted with a hammer repeatedly? Explain your answer. Robots are used in automobile industries to weld two components at specific locations. Thus, the end position of the robot arms must be determined accurately in order to weld the components at the precise position. In selecting a proper material for the robot arms design, identify the factors must be considered for this application.

a. Define nanomaterials and mention any two applications of nanomaterials. Explain, in your own words, why the colour of nanoparticles change from their macro size particles.