Figure 6 An atomic force microscope image of the wells generated by etching the inner core of each optical fiber in an optical fiber bundle. The capacity of each well is on the order of a few femtoliters. (Courtesy of David R.Walt Group, Tufts University.)

DOI link for Figure 6 An atomic force microscope image of the wells generated by etching the inner core of each optical fiber in an optical fiber bundle. The capacity of each well is on the order of a few femtoliters. (Courtesy of David R.Walt Group, Tufts University.)

Figure 6 An atomic force microscope image of the wells generated by etching the inner core of each optical fiber in an optical fiber bundle. The capacity of each well is on the order of a few femtoliters. (Courtesy of David R.Walt Group, Tufts University.)