A phenomenon first observed by an ancient Greek philosopher 2,300 years ago has become the basis for a new device designed to harvest the enormous amounts of energy wasted as heat each year to produce electricity. The first-of-its-kind “pyroelectric nanogenerator” is the topic of a report in ACS’ journal Nano Letters.

Our Sustainable Future: Ancient effect harnessed to produce electricity from waste heat

Taking inspiration from trees, scientists have developed a battery made from a sliver of wood coated with tin that shows promise for becoming a tiny, long-lasting, efficient and environmentally friendly energy source. Their report on the device — 1,000 times thinner than a sheet of paper — appears in the journal Nano Letters.

Natural Sciences

Science & Medicine

Social Sciences

Medicine

In remote regions of the world where electricity is hard to come by and scientific instruments are even scarcer, conducting medical tests at a doctor’s office or medical lab is rarely an option. Scientists are now reporting progress toward an inexpensive point-of-care, paper-based device to fill that void with no electronics required. Their study on the extremely sensitive test, which simply relies on the user keeping track of time, appears in the ACS journal Analytical Chemistry.

Combating Disease: Paper-based device could bring medical testing to remote locales

With the “green” reputation of large hydroelectric dams already in question, scientists are reporting that millions of smaller dams on rivers around the world make an important contribution to the greenhouse gases linked to global climate change. Their study, showing that more methane than previously believed bubbles out of the water behind small dams, appears in ACS’ journal Environmental Science and Technology.

Confronting Climate Change: Stop-Gap Measures to Reduce Greenhouse Gas Emissions: Sediment trapped behind dams makes them ‘hot spots’ for greenhouse gas emissions

As the Fukushima crisis continues to remind the world of the potential dangers of nuclear disposal and unforeseen accidents, scientists are reporting progress toward a new way to detect the radioactive materials uranium and plutonium in waste water. Their report on the design of a highly sensitive nanosensor appears in ACS’ The Journal of Physical Chemistry C.

Promoting Personal Safety and National Security: Improving detection of radioactive material in nuclear waste water

Scientists are reporting an advance in smartphone-based imaging that could help physicians in far-flung and resource-limited locations monitor how well treatments for infections are working by detecting, for the first time, individual viruses. Their study on the light-weight device, which converts the phone into a powerful mini-microscope, appears in the journal ACS Nano.

Combating Disease: Improved smartphone microscope brings single-virus detection to remote locations

A new process can convert a wide variety of vegetable and animal fats and oils — ranging from lard to waste cooking oil — into a key ingredient for making plastics that currently comes from petroleum, scientists say. Their report on the first-of-its-kind process appears in the journal ACS Sustainable Chemistry and Engineering.

Our Sustainable Future: Ancient effect harnessed to produce electricity from waste heat

Download our free app to listen on your phone