Podcast
Questions and Answers
One nanometer is equal to 10^9 meters.
One nanometer is equal to 10^9 meters.
False (B)
Nanoscience is the study of structures and materials that have dimensions at the micrometer scale level.
Nanoscience is the study of structures and materials that have dimensions at the micrometer scale level.
False (B)
A strand of human hair is approximately 1 nanometer in diameter.
A strand of human hair is approximately 1 nanometer in diameter.
False (B)
Nanomaterials have dimensions that are measurable in inches.
Nanomaterials have dimensions that are measurable in inches.
The study of nanomaterials provides novel properties and physical, chemical, and biological phenomena.
The study of nanomaterials provides novel properties and physical, chemical, and biological phenomena.
Nanoscience is only applicable to the medical field.
Nanoscience is only applicable to the medical field.
A nanometer is a hundredth of the width of a human hair.
A nanometer is a hundredth of the width of a human hair.
Nanomaterials have properties that are similar to those of bulk materials.
Nanomaterials have properties that are similar to those of bulk materials.
Nanotechnology is used to make existing products larger and heavier.
Nanotechnology is used to make existing products larger and heavier.
Nanodevices can be used for imaging tools, such as miniature cameras, in medicine.
Nanodevices can be used for imaging tools, such as miniature cameras, in medicine.
The scanning tunneling microscope (STM) was developed in the 1960s.
The scanning tunneling microscope (STM) was developed in the 1960s.
Nanotechnology is used to scale down industrial processes to the macroscale.
Nanotechnology is used to scale down industrial processes to the macroscale.
Nanotechnology is limited to the field of medicine.
Nanotechnology is limited to the field of medicine.
Micro-electromechanical systems (MEMS) are a type of nanodevice.
Micro-electromechanical systems (MEMS) are a type of nanodevice.
Topological insulator electric and photonic systems are not a type of nanodevice.
Topological insulator electric and photonic systems are not a type of nanodevice.
Nanotechnology is a new concept that was introduced in the 1990s.
Nanotechnology is a new concept that was introduced in the 1990s.
Nanomaterials are developed to exhibit decreased strength compared to the same material without nanoscale features.
Nanomaterials are developed to exhibit decreased strength compared to the same material without nanoscale features.
Carbon nanotubes are used to create displays with better color and lower energy consumption.
Carbon nanotubes are used to create displays with better color and lower energy consumption.
Titanium Oxide (TiO2) is a naturally occurring nanomaterial.
Titanium Oxide (TiO2) is a naturally occurring nanomaterial.
Dendrimers are a type of nanomaterial used in nanomedicine.
Dendrimers are a type of nanomaterial used in nanomedicine.
Graphite is a nanomaterial with increased chemical reactivity.
Graphite is a nanomaterial with increased chemical reactivity.
Volcanic ash is an incidental/anthropogenic source of nanomaterials.
Volcanic ash is an incidental/anthropogenic source of nanomaterials.
Liposomes are a type of nanomaterial used in nanofabrication.
Liposomes are a type of nanomaterial used in nanofabrication.
Fullerenes are used to create displays with better color and lower energy consumption.
Fullerenes are used to create displays with better color and lower energy consumption.
Study Notes
Nanotechnology
- Nanotechnology is derived from the Greek word "NANO," meaning dwarf or small.
- 1 nanometer (nm) is equal to 10^(-9) meters, or one billionth of a meter.
Nanoscale
- The nanoscale is a range of dimensions that are measured in nanometers.
- Examples of nanoscale objects:
- A sheet of paper is approximately 100,000 nm thick.
- A strand of human DNA is about 2.5 nm in diameter.
- 1 inch is equal to 25,400,000 nm.
- A strand of human hair is between 80,000 - 100,000 nm thick.
Nanoscience
- Nanoscience is the study and application of structures and materials at the nanoscale level.
- It involves understanding the properties and phenomena of materials at the molecular level.
- Applications of nanoscience:
- Strength
- Weight/mass
- Control of light spectrum
- Chemical reactivity
Nanodevices
- A nanodevice is a device with at least one dimension in the nanoscale or comprising one or more nanoscale components.
- Examples of nanodevices:
- Photonic, plasmonic, and metamaterial devices
- Bio/chemical/nano sensing devices
- Energy harvesting systems
- Micro-electromechanical systems (MEMS)
- Microfluidics and Microsystems
- Low-dimensional nanostructures
- Topological insulator electric and photonic systems
- Bioelectronics
Importance of Nanotechnology
- Nanotechnology aims to improve existing industrial processes, materials, and applications by scaling them down to the nanoscale.
- Benefits of nanotechnology:
- Lighter
- Stronger
- Faster
- Smaller
- More durable
- More efficient
Antecedents of Nanotechnology
- The concept of nanotechnology began with a talk by physicist Richard Feynman entitled "There's Plenty of Room at the Bottom."
- Feynman described a process for manipulating and controlling individual atoms and molecules.
- The development of the Scanning Tunneling Microscope (STM) in 1981 enabled the creation of nanoscale innovations.
Nanomaterials
- Nanomaterials are used to create innovative products, such as displays with better color and lower energy consumption.
- Examples of nanomaterials:
- Carbon nanotubes
- Diamond
- Quantum dots
- Fullerenes
- Graphite
- Graphene
- Graphene oxide
- Dendrimers
- Liposomes
- DNA
- Titanium Oxide (TiO2)
- Silver
- Iron Oxide (FeO2)
Nanosources
- Nanosources can be naturally occurring or incidental/anthropogenic.
- Examples of naturally occurring nanosources:
- Volcanic ash
- Forest fires
- Ocean spray
- Fine sand
- Dust
- Examples of incidental/anthropogenic nanosources:
- Produced as a consequence of human activities, such as combustion processes.
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