Progress toward smell television: Targeted release of various scents from individually addressable chambers

 3-D movies, Dolby surround for a more realistic audio experience -- virtual reality is on the march. And how much more realistic would a film be if a barbecue actually smelled of grilled meat or if you could smell a sea breeze when the protagonist takes his love for an evening stroll on the beach? This type of smell experience may become reality for the home television viewer in the not-too-distant future.

In the journal Angewandte Chemie, a team led by Jongmin Kim at Samsung Electronics in Korea and Sungho Jin at the University of California, San Diego, USA, have now introduced a new approach for making a compact device that could fit on the back of a television to produce thousands of different scents.

Previous technologies for the controlled release of scents were not simple enough and were much too crude for the sensitive electronics of our televisions and video players. An odor module needs to be small and robust and deliver results that are reproducible over multiple cycles; the response should be rapid and the user should be able to regulate the strength of the odor. Kim, Jin, and their co-workers aim to overcome these challenges with their new concept.

Their method is based on an array of individual cells that are filled with scent-containing solutions. The miniature containers are made from a cross-linked silicone polymer. Except for a tiny hole in the top, they are completely sealed. A needle can be sued to inject a different scent solution into each cell. In the “off” state the tiny hole stays closed. The scent containers are switched on by heating. This causes the silicone to expand and the pressure on the inside to increase, forcing a small amount of gas-phase scent out of the tiny hole.

A two-dimensional lattice of heating wires, known as an X-Y matrix, can be used to specifically address individual containers. The scientists prepared a prototype, which they successfully tested with two different perfumes, “Live by Jenifer Lopez” and “Passion by Elizabeth Taylor”. Testers could detect both scents and differentiate between them.

“Our new concept is not only of interest for the entertainment industry,” state Kim and Jin, “it could also be used for combinatorial studies of gas-phase reactions and the development of vapor-based pharmaceuticals.”

More information: Sungho Jin, An X–Y Addressable Matrix Odor-Releasing System Using an On–Off Switchable Device, Angewandte Chemie International Edition, http://dx.doi.org/ … ie.201102759

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Chemists play important roles as advisers for science-based television shows, movies

Do television shows like House, Breaking Bad, and Zula Patrol -- major sources of information about science and technology for millions of people -- try to get it right? Or do they play fast and loose with the facts, images, and nuances that forge public perceptions about science and help shape young people's career decisions?

Producers and writers for some of television's most popular medical, crime, science and science fiction shows today said they do strive for accuracy and ask more scientists to get involved and lend a hand in helping TV accurately portray science. It happened at a symposium titled "Hollywood Chemistry," held, quite appropriately, as part of the 241st National Meeting & Exposition of the American Chemical Society (ACS), the world's largest scientific society. Among the shows represented were House, Fox; Breaking Bad, AMC; Battlestar Galactica, Syfy; Eureka, Syfy, and Zula Patrol, PBS.

"Hollywood Chemistry" is one of the special Presidential Events, enabled by Nancy B. Jackson, Ph.D. ACS president for 2011. Donna Nelson, Ph.D., a chemist adviser for the six-time Emmy Award-winning AMC Channel show Breaking Bad, who organized the program with Jackson, said Hollywood needs more scientists to volunteer to vet the scientific accuracy of scripts and storyboards.

"It's really important for scientists to work with television and movie producers and writers so that when people watch science-based shows and films they are getting accurate information," Nelson said. She is with affiliated with the University of Oklahoma and the Massachusetts Institute of Technology. "The people who make TV shows and films really are interested in getting the science right. They are serious in striving for accuracy and realism. For example, the credits at the start of Breaking Bad feature symbols of chemical elements from the Periodic Table. The symbols Br and Ba are for the elements bromine and barium as in 'Breaking Bad'."

Nevertheless, Breaking Bad producer Vince Gilligan told Nelson that she was the only chemist who volunteered to help with the accuracy of Breaking Bad, set and produced in Albuquerque, N.M. Nelson suspects it might not be due to any lack of a spirit of volunteerism among chemists, but chemists' reluctance to affiliate themselves with Breaking Bad's storyline. The series is about a high school chemistry teacher, diagnosed with advanced lung cancer, who seeks financial security for his family by making and selling methamphetamine.

More than ever, Nelson said, with 2011 the International Year of Chemistry (IYC), chemists have the opportunity to help increase public awareness of chemistry's major role in improving everyday life.

Nelson said that the producers and writers in the symposium discussed how -- with the help of advisers -- they accurately portrayed scientists at work and suggested how chemists and other scientists can help with scripts in the future. In addition, the symposium focused on new ideas and evaluated existing ones for better communicating science to the public.

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The above story is reprinted (with editorial adaptationsaff) from materials provided by American Chemical Society, via EurekAlert!, a service of AAAS.