Our lab recently published on a new cell culture microbubble platform in Lab on a Chip: http://pubs.rsc.org/en/Content/ArticleLanding/2014/LC/c3lc50584g#!divAbstract
Other journals that might be suitable are Biomedical Microdevices, Nanotechnology, and ACS Nano.
Please try one of these journals. You should always consider quartile of the journal as well as impact factor. Try to read the scope of journal before submitting.
Biosensors & Bioelectroncis, ACS Nano, Materials Today, Journal of Nanomaterials.