Beech is a hard, strong and heavy wood. It has a fine, tight grain and even texture. Beech wood is very light in colour and has a high shock resistance. It is a popular wood for cutting board and will give your kitchen a warm feeling. With its smooth finish it is a great wood to polish.
The US dollar, Swiss franc, yen and euro are experimental subjects and aluminum oxide, gold and organic molecules are directly printed on these currencies to form multilayer thin film transistors. In the end, scientists successfully printed 100 thin-film transistors on each bank note. They only need 3 volts to work, and the power supply can be provided by wireless devices.
At present, the researchers have not found a way to prevent the counterfeiting of such banknotes, but this experiment can at least prove that it is entirely feasible to directly print the micro-flexible circuit onto banknotes. Scientists said that such a circuit can easily track the direction of currency circulation and verify its authenticity.
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