Scientists develop tractor beam capable for levitating objects larger than an acoustic wavelength. The discovery opens the door to the manipulation of drug capsules or micro-surgical implements within the human body. Container-less transportation of delicate larger samples is now also a possibility.

See the source article by following the link below:
Scientists develop tractor beam capable for levitating objects larger than an acoustic wavelength. The discovery opens the door to the manipulation of drug capsules or micro-surgical implements within the human body. Container-less transportation of delicate larger samples is now also a possibility.