Episode 4: Properties of Nanomaterials:
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Episode 4: Properties of Nanomaterials:
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Materials behave differently at the nanoscale due to quantum effects and increased surface interactions. Optical properties such as plasmon resonance enable applications in sensing and imaging. Electrical properties change as quantum confinement alters electron behavior. Mechanical strength often increases as defect sizes become comparable to the nanoscale dimensions. Magnetic properties like superparamagnetism emerge in nanoparticles.This episode examines how nanoscale dimensions influence material behavior. Quantum confinement is explained as the source of size-dependent optical and electrical properties. The increased surface-to-volume ratio enhances chemical reactivity and catalytic activity. Examples include gold nanoparticles that appear red due to plasmon resonance and carbon nanotubes with exceptional strength. The discussion connects these properties to potential applications in electronics, medicine, and energy. Students gain insight into how tuning material dimensions can achieve desired functionalities.