Reduced Graphene Oxide Tattoo as Wearable Proximity Sensor. - Vaishakh Kedambaimoole; Neelotpala Kumar; Vijay Shirhatti; Suresh Nuthalapati; Saurabh Kumar; Mangalore Manjunatha Nayak; Prosenjit Sen; Deji Akinwande; Konandur Rajanna (CoRR, 2020)