Zhen Cheng is a researcher at the Shanghai Institute of Materia Medica and Stanford University. (Photo courtesy of Xiao lab/Rice University) Han Xiao is an assistant professor of chemistry, biosciences and bioengineering at Rice University. (Photo courtesy of Xiao lab/Rice University) Rice’s Han Xiao, Stanford’s Zhen Cheng and collaborators have developed a new tool for noninvasive brain...