Engineers in London are working on a sonic screwdriver:
(http://Professor%20Bruce%20Drinkwater,%20an%20ultrasonics%20engineer%20at%20the%20University%20of%20Bristol,%20said:%20"We%20have%20developed%20a%20device%20that%20allows%20us%20to%20use%20ultrasonic%20forces%20to%20move%20small%20objects%20like%20biological%20cells%20around%20to%20sort%20them%20or%20to%20assemble%20them.%3Cbr%20/%3E%3Cbr%20/%3E"We%20are%20using%20quite%20low%20forces%20to%20do%20this%20because%20we%20don't%20want%20to%20damage%20the%20objects%20we%20are%20moving,%20but%20the%20technology%20is%20definitely%20real%20and%20there%20is%20potential%20to%20turn%20it%20into%20something%20like%20Dr%20Who's%20sonic%20screwdriver.%3Cbr%20/%3E%3Cbr%20/%3E"If%20we%20can%20increase%20the%20ultrasonic%20force%20and%20create%20a%20rotational%20force,%20then%20we%20could%20potentially%20undo%20screws.%20Essentially%20what%20you%20are%20doing%20is%20using%20the%20ultrasonic%20sound%20wave%20to%20twirl%20the%20air%20around%20to%20create%20a%20miniature%20tornado.")
http://www.smh.com.au/world/science/not-quite-doctor-who-but-sonic-screwdriver-a-new-twist-for-science-20101205-18lfb.html