What is a nanoparticle?
Explanation: The correct answer is B) A particle with dimensions in the nanoscale range. A nanoparticle is a particle with dimensions typically ranging from 1 to 100 nanometers. Nanoparticles exhibit unique properties due to their small size and high surface-to-volume ratio, making them useful in various applications.
Which of the following statements is true about nanomaterials?
Explanation: The correct answer is B) They have different properties than bulk materials. Nanomaterials exhibit unique properties at the nanoscale that differ from bulk materials. These properties are influenced by factors such as quantum effects, increased surface area, and size-dependent behavior, making them suitable for various applications.
What is the significance of quantum confinement in nanomaterials?
Explanation: The correct answer is C) It affects their electronic and optical properties. Quantum confinement in nanomaterials refers to the confinement of electrons or photons within the nanoscale dimensions. This confinement alters the electronic and optical properties of the nanomaterials, leading to phenomena such as size-dependent bandgap and emission wavelength.
What is the primary fabrication technique for producing nanoparticles?
Explanation: The correct answer is C) Nanolithography. Nanolithography is the primary fabrication technique used for producing nanoparticles. It involves the patterning and manipulation of materials at the nanoscale to create nanostructures and nanoparticles with precise control over their size, shape, and arrangement.
What are some applications of nanomaterials and nanoparticles?
Explanation: The correct answer is D) All of the above. Nanomaterials and nanoparticles have a wide range of applications. They are used in drug delivery systems for targeted therapy, in electronics and optoelectronics for miniaturization and improved performance, and in environmental remediation for pollutant removal and sensing.