* Corresponding authors

^a Max Planck Institute for Solid State Research, Heisenbergstraße 1, 70569 Stuttgart, Germany
E-mail: m.terban@fkf.mpg.de

^b Leicester School of Pharmacy, De Montfort University, The Gateway, Leicester, UK

^c Department of Chemical Engineering and Analytical Science, University of Manchester, Manchester M13 9PL, UK

^d Department of Pharmacy, University of Copenhagen, Universitetsparken 2, Copenhagen, Denmark

^e Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics, Department of Health Technology, Technical University of Denmark, Kongens Lyngby, Denmark

^f Deutsches Elektronen Synchrotron (DESY), Notkestraße 85, 22607 Hamburg, Germany

^g Department of Applied Physics and Applied Mathematics, Columbia University, New York, USA

^h Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, NY 11973, USA

ⁱ Department of Chemical and Pharmaceutical Sciences, University of Trieste, Piazzale Europa 1, 34127 Trieste, Italy
E-mail: dhasa@units.it