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Questions and Answers
What is the ability of a material to deform easily upon the application of a tensile force?
What is the ability of a material to deform easily upon the application of a tensile force?
- Malleability
- Plasticity
- Elasticity
- Ductility (correct)
What is the term for materials that are sized between 1 to 100 nanometers?
What is the term for materials that are sized between 1 to 100 nanometers?
- Micromaterials
- Nanomaterials (correct)
- Nanoparticles
- Quantum Materials
What is the shape of carbon-based nanomaterials known as fullerenes?
What is the shape of carbon-based nanomaterials known as fullerenes?
- Cylindrical
- Polyhedral
- Spherical and Ellipsoidal (correct)
- Tubular
What is the term for carbon-based nanomaterials that are cylindrical in shape?
What is the term for carbon-based nanomaterials that are cylindrical in shape?
What is a closely packed semiconductor crystal comprised of hundreds or thousands of atoms?
What is a closely packed semiconductor crystal comprised of hundreds or thousands of atoms?
What are nanosized polymers built from branched units?
What are nanosized polymers built from branched units?
What is the ability of a material to deform by compressive forces without developing defects?
What is the ability of a material to deform by compressive forces without developing defects?
What is the term for materials engineered to such a small scale, often taking on unique optical, magnetic, electrical, and other properties?
What is the term for materials engineered to such a small scale, often taking on unique optical, magnetic, electrical, and other properties?
What is the primary source of cellulose pulp used to produce thin materials?
What is the primary source of cellulose pulp used to produce thin materials?
Which property of a material enables it to return to its original shape after the load is removed?
Which property of a material enables it to return to its original shape after the load is removed?
What is the opposite of the property of plasticity?
What is the opposite of the property of plasticity?
What is the ability of a material to resist deformation under load?
What is the ability of a material to resist deformation under load?
What is the combination of strength and plasticity?
What is the combination of strength and plasticity?
What is the resistance to permanent indentation, scratching, and wear?
What is the resistance to permanent indentation, scratching, and wear?
What is the ability of a material to deform permanently without breaking or rupturing?
What is the ability of a material to deform permanently without breaking or rupturing?
What is the property that enables a material to withstand shock and be deformed without rupturing?
What is the property that enables a material to withstand shock and be deformed without rupturing?
Which of the following is NOT a property of metals?
Which of the following is NOT a property of metals?
What is the primary function of Cerium (IV) oxide nanoparticles in diesel and bio-diesel fuels?
What is the primary function of Cerium (IV) oxide nanoparticles in diesel and bio-diesel fuels?
Which type of alloy is formed when a metal is mixed with another metal?
Which type of alloy is formed when a metal is mixed with another metal?
What is the primary structural unit of a polymer?
What is the primary structural unit of a polymer?
What is the main purpose of carbon nanotubes when added to polymers?
What is the main purpose of carbon nanotubes when added to polymers?
Which of the following is NOT a potential application of nanomaterials in textiles?
Which of the following is NOT a potential application of nanomaterials in textiles?
What is the main function of bioMEMS devices implanted in the body?
What is the main function of bioMEMS devices implanted in the body?
How are gold nanoparticles used in cancer treatment?
How are gold nanoparticles used in cancer treatment?
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Study Notes
Material Properties
- Ductility is the ability of a material to stretch when applied with stress, especially under tensile forces.
- Malleability is the property that enables a material to deform by compressive forces without developing defects.
Engineered Nanomaterials
- Are objects sized between 1 to 100 nanometers.
- Can take on unique optical, magnetic, electrical, and other properties.
- Types of nanomaterials include:
- Fullerene (carbon-based, spherical, and ellipsoidal in shape)
- Nanotubes (carbon-based, cylindrical in shape)
- Quantum dots (closely packed semiconductor crystal comprising hundreds or thousands of atoms)
- Dendrimers (nanosized polymers built from branched units)
- Hybrid nanomaterials (combine nanoparticles with other nanoparticles or with larger materials)
Applications of Engineered Nanomaterials
- Catalysis: Cerium (IV) oxide nanoparticles are used to facilitate complete combustion in diesel and bio-diesel fuels.
- Polymers and Glass: Carbon nanotubes are used to strengthen structures, increase electrical conductivity, and enhance heat transfer.
- Textile and Fabric: Nanomaterials can provide anti-bacterial, anti-fungal, deodorizing, thermal-regulating, and static-free properties to fabrics.
- Healthcare: Gold nanoparticles can be used to locate cancer cells and destroy them by irradiating with infrared.
Mechanical Properties of Materials
- Describes the behavior of material in terms of deformation and resistance to deformation under specific mechanical loading conditions.
- Types of mechanical properties:
- Hardness (resistance to permanent indention, scratching, and wear)
- Strength (ability to resist deformation under load)
- Toughness (ability to withstand shock and deformation without rupturing)
- Brittleness (opposite of plasticity, where material breaks or shatters before deforming)
- Elasticity (ability to return to original shape after load is removed)
- Plasticity (ability to deform permanently without breaking or rupturing)
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