Ultra-small Ab initio 1 Ascorbic acid 1 Atomic simulations 1 CCD cameras 1 Calculations 1 Carbon 1 Carbon-based 1 Charge coupled devices 1 Charge coupled devices camera 1 Chemical detection 1 Data acquisition 1 Deposition 1 Direct beams 1 Doping (additives) 1 Electrochemical sensor 1 Electrochemical sensors 1 Electronic properties 1 Electronic structure 1 Enhanced samplings 1 Entropy 1 First principles electronic structure 1 Free energy 1 Free energy landscape 1 Glass membrane electrodes 1 Graphical user interfaces 1 High resolution transmission electron microscopy 1 Human urine samples 1 Iron oxides 1 Isomers 1