LESSON 4 Flashcards
It is the branch of technology that deals with manipulation and study of matter at the nanoscale.
nanotechnology
At what scales does nanotechnology operate?
Atomic, molecular, and supramolecular scales.
Why is nanotechnology considered “convergent”?
It merges fields like chemistry, biology, and engineering to create innovations (e.g., DNA silicon chips).
Why is nanotechnology considered “enabling”?
It provides tools and platforms to produce innovations.
What are the three dimensions of nanotechnology?
1) Tangible objects (materials, devices),
2) Active/passive devices & nanofacture,
3) Direct/indirect nanoscale structures.
What are passive nanoscale objects?
Nanoparticles with properties different from bulk materials.
What are active nanoscale devices?
Devices that store information, induce energy, or change state.
What is nanofacture or APM?
Atomically precise manufacturing using nanoscale instruments.
What is direct nanotechnology?
Materials structured at the nanoscale.
What is indirect nanotechnology?
Uses nanoparticles in large-scale applications (e.g., powerful processors).
How is nanotechnology used in medicine?
For drug delivery, cancer treatment using nanoparticles, and even performing nanoscale surgeries with nanobots.
What diseases can nanotech-based screening devices diagnose?
HIV/AIDS, malaria, tuberculosis.
What are zeolites and their use?
Nanoporous silicon and aluminum oxides used as molecular sieves.
What nanotech method purifies water?
Membranes with variable pore sizes like forward-osmosis technology.
What materials make surfaces heat-resistant and self-cleaning?
Nanoparticles of silicon dioxide or titanium dioxide.
How is nanotechnology applied in agriculture?
To breed micronutrient-rich crops, detect pests, and monitor soil, air, and water contamination.
What nanoparticles can remove arsenic from soil and water?
Titanium dioxide (TiO₂) nanoparticles.
How does nanotechnology help in energy efficiency?
Graphene reduces material layers; nanoscale catalysts increase reaction rates.
What metal has strong enhanced antimicrobial properties at nanoscale?
Silver (Ag), especially when shaped into nanoparticles.
How did nanotech help during the Fukushima nuclear incident?
A detector sensed radiation leaks more quickly and accurately.
How does nanotechnology help in detergents?
Molecules form micelles to trap oils and fats.
What are some nanotechnology applications in the Philippines?
Renewable energy, medicine, agriculture.
What agency supports nanotech research in the Philippines?
Department of Science and Technology (DOST).
What is a major environmental concern of nanoparticles?
They pass through sewage systems and pollute water undetected.
