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  _____     _____     ______     ___      _  __  
 / ____||  |  ___||  /_   _//   / _ \\   | |/ // 
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 \_____||  |_____||    |_||   |_||  |_|| |_|\_\\ 
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Text this: Ultrafine Bi<inf>2</inf>WO<inf>6</inf> nanoparticles prepared by flame spray pyrolysis for selective acetone gas-sensing