what they are, how they are made, what they are used for
Carbon nanotubes are cylindrical molecules that consist of rolled-up sheets of single-layer carbon atoms (graphene); they possess unique properties like high aspect ratio, mechanical strength, electrical and thermal conductivity, chemical stability, and a tip-surface area near the theoretical limit. They are one of the strongest materials known to man.
Nanotechnology and Emerging Technologies News from Nanowerk
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Nanotechnology Introduction: A Complete Beginner's Guide
More specifically, nanotechnology is the imaging, modeling, measuring, design, characterization, production, and application of structures, devices, and systems by controlled manipulation of size and shape at the nanometer scale (atomic, molecular, and macromolecular scale) that produces structures, devices, and systems with at least one novel/superior characteristic or property.
Nanofiltration explained - definition and examples - Nanowerk
Nanofiltration is a type of membrane filtration process that is used to separate molecules based on size. It is one of the four membrane technologies that utilize pressure to effect separation of contaminants from water streams but it is more selective in the types of molecules it can filter out.
What is smart dust and how is it used? - Nanowerk
Smart dust refers to wireless networks of sub-millimeter-scale autonomous computing and sensing platforms not larger than a grain of sand. Smart dust senses and records data about its environment such as light, temperature, sound, presence of toxins or vibrations, and transmits that data wirelessly to larger computer systems
Nanomachines: Nature's Marvels and the Future of …
Nanomachines are nanoscale devices that can perform specific tasks at the molecular level. These tiny machines, typically ranging from 1 to 100 nanometers in size, are found in both biological systems and artificially created structures. Biological nanomachines have evolved over millions of years to carry out crucial functions in living …
Nanoelectronics - Definition and Applications - Nanowerk
Nanoelectronics covers a diverse set of devices and materials, with the common characteristic that they are so small that physical effects alter the materials'properties on a nanoscale – inter-atomic interactions and quantum mechanical properties play …
What are Nanomaterials - Nanowerk
Materials reduced to the nanoscale can suddenly show very different properties compared to what they show on a macroscale. For instance, opaque substances become transparent (copper); inert materials become catalysts (platinum); stable materials turn combustible (aluminum); solids turn into liquids at room temperature (gold); insulators become conductors (silicon).
Exploring the Nanometer in Science and Technology - Nanowerk
A nanometer (nm) is a unit of length in the metric system, defined as one billionth (10-9) of a meter (m).The meter is the base unit of length in the International System of Units (SI), making the nanometer a derived unit used primarily to measure the atomic and molecular scale of materials and the wavelength of electromagnetic radiation.
What are quantum dots? - Nanowerk
Quantum dots – nanoparticles of semiconductors – were first theorized in the 1970s and then successfully synthesized in the early 1980s. When semiconductor particles are made small enough, they exhibit quantum size effects, which restrict the energies at which electrons and holes (the absence of electrons) can exist within the …