Lesson 13 - Nanotechnology Flashcards
(25 cards)
It is a branch of technology that deals with
the manipulation and study of matter at
nanoscale level.
Nanotechnology
A nanoscale deals with dimensions between
approximately __ and __ nanometers;
billionths of a meter (10^-9)
1 and 100 nanometers
Nanoscale Level
▪ Small dimensions
▪ Materials possessing, at minimum, one external dimension measuring 1-100nm
Can occur naturally, be created
as the by-products of
combustion reactions, or be
produced purposefully through
engineering to perform a
specialized function.
Nanomaterial
Exhibit unique physicochemical properties that differ markedly from their bulk counterparts.
Nanomaterial
❑ It involves design, characterization, production, and application of
structures, devices, and systems by controlling shapes and sizes at
the nanometer scale.
❑ It covers all types of research and technologies that deal with special
properties of matter on an atomic molecular and supramolecular
shape.
❑ Convergent science: brings together various fields of science through
its innovations
❑ Enabling science: provides platforms for new innovations
Nanotechnology
brings together various fields of science through
its innovations
Convergent science
provides platforms for new innovations
Enabling science
▪ Japanese scientist; first to use and define
the term “nanotechnology” in 1974
▪ “Nanotechnology mainly consists of the
processing of separation, consolidation, and
deformation of materials by one atom or one
molecule”
Norio Taniguchi
when the scanning tunneling
microscope allowed scientists and engineers
to see and manipulate individual atoms.
1981
the Nobel Prize in Physics for inventing the
scanning tunneling microscope.
Gerd Binnig and Heinrich Rohrer (1986)
sunscreen (made of zinc oxide and/or titanium dioxide); cakey or forms white film or residue on the skin
1980’s
made up of chemicals like oxybenzone,
avobenzone, and octinoxate; harsh on skin
chemical sunscreen
zinc oxide and titanium dioxide; doesn’t leave a
white tint behind
mineral sunscreen
which can employ
molecular processes within cells
that delivers drugs to specific
molecular sites or even carry out
surgery (Biercuk, 2011).
Nanobots
have been utilized in
wound dressing, surgical textiles and
implants, tissue technology, and
artificial organ components.
Nanofibers
are creating intelligent
bandages which are absorbed into
the tissue when the wound has
healed.
Scientists
A new skin-like _______ developed by
researchers can heal wounds in about a
day.
hydrogel
made of entangled polymers
and nanosheets, can repair itself up to ______
in _____ hours and fully restore within ______
hours.
hydrogel
90%
four hours and fully restore within 24 hours
is enhanced with the discovery of
its bactericidal properties of Ag
nanoparticles (1-100 nm)
antimicrobial properties of Silver (Ag)
are used in the form of prostheses and wound dressings embedded antimicrobial agents and for
coatings of surgical instruments.
Silver nanoparticles
have specific nanoporous cage-like structures used in molecular sieves.
Zeolites (SiO and Al2O3)
acts as super capacitors for energy storage; manufacturing of rechargeable batteries
Graphene
Its coatings can also serve as protective coatings with superior chemical, moisture, corrosion, UV,
and fire-resistance properties.
Graphene
