Frequently Asked Questions
1. WHAT IS NANOTECHNOLOGY?
derived from the Greek word for dwarf. 1
approximately 100,000 times thinner than a human
Nanotechnology is a rapidly growing science of
producing and utilizing
nano-sized particles that measure in nanometers
(1 nm = 1 billionth of
a meter). The term nanoparticle is generally
used to indicate particles
with dimensions less than 100 nanometers (one
nanometer is one
billionth of a meter). For comparison, a human
hair is about 100,000 nm
in diameter, while a smoke particle is about
1,000 nm in diameter.
2. WHAT ARE POTENTIAL
For Epidemic (H5N1,
SARS, MRSA) defense
prevention after earthquake,
flood, cyclone and etc.
public room, home daily
For use on wood,
marble, granite, metal,
paint and concrete surfaces
For printing and
For early stage
cleaning of water for
For port and sea
3. WHAT IS TITANIUM DIOXIDE
the 9th-most common element on earth and titanium
oxide is used as a
white pigment in paint and cosmetics. As a
pigment a lower grade
titanium dioxide is used. For photocatalyst
air-purifying, anti-bacterial use and
self-cleaning purposed a very
high-grade photo reactive titanium dioxide is
used. Its high
levels of reaction to light enable it to act as a
catalyst to produce
large quantities of hydroxyl radicals that cause
the oxidation of
organic matter, sterilize most bacteria and clear
the air of
pollutants. Titanium dioxide can do this
without changing its own
structure, thereby causing it to have an
indefinite life span.
Add to this the fact that it is non-toxic to the
humans, it is no wonder it is being talked about
in the same glowing
terms used to describe the future of plastic when
it first came to the
4. ARE NANO-PRODUCTS SAFE?
ARE THEY TOXIC?
Safety of TiO2
as photocatalyst is physically and chemically
safe, the US
certified it as a food additive in 1968 and Japan
1983. It is now used widely in making
white chocolates and
functional cosmetics, including lipsticks.
The Food Analysis
Center of Japan Food Research Laboratories and
Safety Institute Ltd. demonstrated its safety
through skin simulating
tests and acute oral toxicity test.
5. WHAT IS A PHOTOCATALYST?
defined as "acceleration by the presence of a
catalyst". A catalyst
does not change in itself or being consumed in the
This definition includes photosensitization, a
process by which a
photochemical alteration occurs in one molecular
entity as a result of
initial absorption of radiation by another
molecular entity called the
Chlorophyll of plants is a type of photocatalyst
Photocatalysis is when chlorophyll captures
sunlight to turn water and
carbon dioxide into oxygen and glucose.
Photocatalysis is the creation
of a strong oxidation agent to breakdown any
organic matter to carbon
dioxide and water in the presence of the
photocatalyst, light and water.
Photocatalyst & Chlorophyll
6. WHAT ARE VOCs AND WHERE DO THEY
Volatile Organic Compounds are gases given off by
a number of indoor
one of the most common VOCs. Formaldehyde is a
colorless gas with an
unpleasant smell. It is common in many building
materials such as
plywood, particleboard, and glues. Formaldehyde is
also found in
furnishings (furniture, drapes and carpets) and in
some types of foam
insulation. Other sources of VOCs and formaldehyde
include burning of
fuels: gas, wood, kerosene, and tobacco products.
VOCs also come from
personal care products such as perfumes and hair
spray, from cleaning
agents and dry cleaning fluid, paints, lacquers
and varnishes, and from
copying and printing machines.
be released from a product for several years,
though the amounts
given off tend to be less as the product ages and
7. WHAT SYMPTOMS DO VOCs CAUSE?
cause irritation of the eyes, nose and throat,
dizziness, and skin problems. Higher amounts can
cause irritation of
the lungs and wheezing. Higher exposures to
formaldehyde may also cause
memory problems and anxiety.
8. WHAT IS OXIDATION?
of combining oxygen with some other substance or a
change in which and atom loses electrons.
The most powerful
advanced oxidation systems are based on the
generation of hydroxyl
radicals. They act as very powerful disinfecting
agents by oxidizing
cells of micro-organisms, causing rapture of the
cell and leakage of
9. HOW DOES NANO-TiO2 PROTECT AGAINST
BACTERIA AND VIRUSES?
a negative charge while TiO2 coated surface
carries a positive
charge. This creates an "electromagnetic"
attraction between the
microbe and treated surface. Once contact is made,
the microbe is
oxidized and dies instantly.
10. WHY IS NANO-TiO2
is originally water-soluble, it dries quickly
after application and
becomes water-insoluble. It also becomes very hard
in ten to fourteen
days after application. It does not come off
unless the surface is
polished. Titanium dioxide is merely the catalyst
and is not changed,
its effect is semi-permanent except when walls and
11. WHAT IS ANTI-STATIC?
Dust particle is no longer attracted
to the oily
components on the TiO2 treated surface.
12. WHAT IS HYDROPHILIC?
water loving. When the surface of photocatalytic
film is exposed to
light, the contact angle of the phtocatalyst
surface with water is
reduced gradually. After enough exposure to light,
the surface reaches
a super-hydrophilic state. In other words, it does
not repel water at
all, so water cannot exist in the shape of a drop,
but spreads flatly
on the surface of the substrate. The water takes
the form of a highly
uniform thin film, which behaves optically like a
clear sheet of
glass. The hydrophilic nature
of titanium dioxide, coupled
with the gravity, will enable the dust particles
to be swept away
following the water stream, thus making the
13. WHERE TO APPLY?
buildings to prevent UV attack. (One of the
PHOTOCATALYST is to absorb UV light)
on external walls will have a self clean
property, that is the
wall is not easy to get dirty.
walls of entire estate will lower the rate of
bacteria, virus, mold, etc, and keep people
strong and healthy.
on walls of highway & tunnel lights will
decomposition of NO2 & NO3 that emitted
on garden facilities can lower the possibility
infections of bacteria & virus by
be sprayed on filters of central air-con to
decompose the bacteria
that captured on the filter, and reduce the
decompose those organic VOC gases and so as
formaldehyde from paint
& woodwork after decorations. *Some
medical report indicates
that formaldehyde is closely related to the
Children Blood Cancer.
on walls and ceiling can lower the
bacteria, and so as the bad odor.
also protect masks , toys, telephone, fans,
curtains, toilet, bed,
We provide photocatalyst surface
coating for long-lasting effects of deodorization,
anti-soiling purposes. Using
regular spray-coating equipments, a
fine mist of photocatalyst can be applied on
different types of surface
material that guarantees the maximum result.