“There are inorganic materials made
from rare-earth metals that can facilitate
this upconversion process,” said Jan C.
“Kees” Hummelen, a University of
Groningen professor of organic chemistry
and leader of the FOM focus group on
next-generation organic photovoltaics.
“However, these materials absorb very
few infrared photons. We have therefore
attached organic molecules to them [as an-
tennas] that can capture these photons and
transmit the energy to the upconversion
Because of this, the entire infrared ab-
sorption process, upconversion and the
emission of visible light is increased by a
factor of 3300, Hummelen said.
Nanohole-based sensors ideal for medical diagnostics
SINGAPORE – Novel molecular sensors
based on thin metallic films with nanoholes hold promise for applications that
require detection of small quantities of
molecules, such as gas biomedical diagnostics and gas sensing.
The majority of these applications call
for inexpensive disposable sensors, but
they must be sensitive enough to detect