Nanomaterials: Characteristics and Uses

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What is a common method to stabilize nanoparticles against coagulation or aggregation?

Decreasing the surrounding temperature

Using electromagnetic pulses

Modifying the surface charge (correct)

Increasing the particle size

What can occur on the surface of a nanoparticle as it cools down and is exposed to different ambient atmospheres?

Phases transition of the particle

Electrostatic repulsion of the particle

Evaporation of the particle

Condensation of various agents (correct)

What is the purpose of using polyelectrolytes at the nanoparticle-liquid interface?

To modify surface properties and interactions (correct)

To change the particle shape

To increase the particle size

To reduce the surface tension of the nanoparticle

At what scale do the physical and chemical properties of a nanoparticle change?

Between the Angstrom level and the micrometer scale Signup and view all the answers

What determines the properties of a nanoparticle in a complex way?

Atomic and molecular origin Signup and view all the answers

What is the term for a mixture of two liquid phases?

Emulsion Signup and view all the answers

What is the significance of the number N in the properties of materials with nanoscale dimensions?

It is a critical parameter that defines the properties of small systems. Signup and view all the answers

What is a characteristic of the atomic ionization potential (IP) of metal clusters?

It varies dramatically and non-monotonically with the number of atoms in the cluster. Signup and view all the answers

What is a consequence of the high surface-to-volume ratio of materials with nanoscale dimensions?

A change in physical properties due to the high surface-to-volume ratio. Signup and view all the answers

What is a result of the research on materials with nanoscale dimensions?

The discovery of materials with properties different from the atom or bulk material. Signup and view all the answers

What is a characteristic of the properties of materials with nanoscale dimensions?

They exhibit a strong dependence on the number of atoms in the material. Signup and view all the answers

What is an area of research related to materials with nanoscale dimensions?

Theoretical and experimental understanding of materials. Signup and view all the answers

What is the primary characteristic of nanomaterials that distinguishes them from the same material without nanoscale features?

Novel physical properties Signup and view all the answers

What is the size range of a nanomaterial according to the ISO definition?

1-100 nm Signup and view all the answers

What is the percentage of particles in the number size distribution required for a material to be classified as a nanomaterial according to the European Commission's recommendation?

50% or more Signup and view all the answers

What is the primary purpose of the European Commission's recommendation on the definition of a nanomaterial?

To be used in European Regulations, including REACH and CLP Signup and view all the answers

What is the term for the arrangement of particles in a nanomaterial, according to the European Commission's recommendation?

All of the above Signup and view all the answers

Why is the definition of a nanomaterial important?

To classify materials based on their size and characteristics Signup and view all the answers

What is the primary method of extracting heavy oil from Tar Sands?

Strip-mining with hot water Signup and view all the answers

Which of the following is NOT a type of Light Oil?

Fuel Oil Signup and view all the answers

What is the term for the ratio of elements present in a compound?

Empirical Formula Signup and view all the answers

What is the primary method of extracting oil from Oil Shale?

Pyrolysis after mining Signup and view all the answers

What is the term for the actual formula of a molecule?

Molecular Formula Signup and view all the answers

Which of the following is an example of a Solid Fuel?

Coal Signup and view all the answers

What is the primary purpose of controlled nuclear fission in reactors?

To release energy for the production of electricity Signup and view all the answers

What is the main difference between nuclear energy and energy released in ordinary chemical reactions?

Nuclear energy is released from the nucleus, while chemical reactions release energy from the orbital electrons Signup and view all the answers

What is the name of the process by which nuclear energy is released?

Nuclear fission Signup and view all the answers

What is the purpose of the Unit Learning Outcome (TLO) 2?

To demonstrate appropriate concepts of Nuclear Chemistry and Energy Signup and view all the answers

Who is the author of the document?

Engr.N.L.Escalante Signup and view all the answers

What is prohibited without the prior written permission of SLU?

Reproduction, storing, distributing, uploading or transmitting of any part of the document Signup and view all the answers