Uv Pen
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Marvel The Avengers: Secret Message Lab
Pssst! Want to learn how to make and break secret messages like a real spy? Of course you do! This practical field guide has everything kids need to know about the art (and science!) of concealment—ciphers, codebreaking techniques, and plenty of hands-on practice sessions to help you become a super-secret spy. Go undercover with your favorite Avengers, such as Iron Man, Thor, Captain America, and more. Avengers assemble! In this must-have for fans of The Avengers, you can how to write and decipher hidden messages using: A message mask you can share with your friends for revealing secret messages A code wheel you and your friends can use to pass top-secret notes A special invisible ink pen along with the ink-revealing light pen A wax crayon and reveal spray bottle A red pen and red decoder lens A special 32-page book containing many secrets of the spy world
Organic Photovoltaics
Author: Christoph Brabec
language: en
Publisher: John Wiley & Sons
Release Date: 2014-02-20
The versatility of organic photovoltaics is already well known and this completely revised, updated, and enlarged edition of a classic provides an up-to-date overview of this hot topic. The proven structure of the successful first edition, divided into the three key aspects of successful device design: materials, device physics, and manufacturing technologies, has been retained. Important aspects such as printing technologies, substrates, and electrode systems are covered. The result is a balanced, comprehensive text on the fundamentals as well as the latest results in the area that will set R&D trends for years to come. With its combination of both academic and commercial technological views, this is an optimal source of information for scientists, engineers, and graduate students already actively working in this field, and looking for comprehensive summaries on specific topics.