1 Department of Biomedical Engineering, Texas A&M University, College Station, TX, USA.
2 Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
3 School of Electrical and Electronic Engineering, Yonsei University, Seoul, Republic of Korea.
4 Applied Mechanics Laboratory, Department of Engineering Mechanics, Center for Mechanics and Materials and Center for Flexible Electronics Technology, Tsinghua University, Beijing, China.
5 Department of Materials Science and Engineering, Pusan National University, Busan, Republic of Korea.
6 Department of Materials Science and Engineering, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
7 Department of Psychology, University of Alberta, Edmonton, Alberta, Canada.
8 Department of Electrical Engineering, Stanford University, Stanford, CA, USA.
9 Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
10 Departments of Civil and Environmental Engineering, Mechanical Engineering, and Materials Science and Engineering, Northwestern University, Evanston, IL, USA.
11 Department of Aerospace Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
12 Feinberg School of Medicine, Northwestern University, Shirley Ryan AbilityLab, Chicago, IL, USA.
13 Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL, USA. [email protected].
14 Department of Materials Science and Engineering, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL, USA. [email protected].
15 Departments of Materials Science and Engineering, Biomedical Engineering, Neurological Surgery, Chemistry, Mechanical Engineering, Electrical Engineering and Computer Science, Simpson Querrey Institute and Feinberg Medical School Center for Bio-Integrated Electronics, Northwestern University, Evanston, IL, USA. [email protected].
In Fig. 4c of this Article, the scale bar units were incorrectly stated as 'μV'; the correct units are 'mV'. The figure has now been amended accordingly.