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Classification of Nanomaterials

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Questions and Answers

Which of the following is an example of a 0-dimensional nanomaterial?

Silver nanoparticles

Carbon nanotubes

Graphene sheets

Quantum dots (correct)

What is the primary classification of nanomaterials based on?

Number of dimensions (correct)

Chemical composition

Synthesis method

Size of the material

Which of the following is an example of a top-down approach to nanomaterial synthesis?

Self-assembly of atoms and molecules

Growing thin layers of InGaAs on GaAs

Formation of carbon nanotubes

Mechanical milling of bulk powder (correct)

What is the key difference between the top-down and bottom-up approaches to nanomaterial synthesis?

Top-down starts with larger materials and reduces them to the nanoscale, while bottom-up builds up from smaller components. Signup and view all the answers

Which type of nanomaterial is described as having a 'branched, tree-like structure'?

Dendrimers Signup and view all the answers

Which of the following is NOT a bottom-up approach for nanomaterial fabrication?

Mechanical milling Signup and view all the answers

What is the key advantage of the bottom-up approach to nanomaterial synthesis?

It allows for the creation of more complex and varied nanomaterial structures. Signup and view all the answers

In the sol-gel method, what is the process involved in the first step (hydrolysis)?

Addition of water to precursor molecules Signup and view all the answers

What is the purpose of using a template in soft and hard templating methods?

To provide a mold for the final nanostructure Signup and view all the answers

In lithography, what is the purpose of the 'expose' step?

To transfer the pattern from the mask to the photosensitive layer Signup and view all the answers

What is the purpose of the 'calcination' step in the sol-gel method?

To convert the gel into a porous ceramic material Signup and view all the answers

Which of the following is an example of a soft template used in soft templating methods?

Block copolymers Signup and view all the answers