Supporting Information Metal oxide based composites in non-enzymatic electrochemical glucose sensors Yogesh M. Chitare, Satish B. Jadhav, Padamaja N. Pawaskar*, Vikas V. Magdum, Jayavant L. Gunjakar, Chandrakant D. Lokhande Centre for Interdisciplinary Research (CIR), D. Y. Patil Education Society (Institution Deemed to be University), Kolhapur-416 006, Maharashtra, India. Corresponding author footnote: Dr. Padamaja N. Pawaskar Email: samgrish@gmail.com Contact No.: + 91-7387746884 Table S1: Hydrothermally synthesized CoO and their composites electrode S. N. Electrode material Bath composition Substrate used Temp. (°C) Time (h) Calcination Temp. (°C) / Time (h) Morphology Sensitivity (μA mM -1 cm -2 ) Ref 1 Co 3 O 4 CoCl 2 (1 mM) + urea (2 mM) Carbon fiber paper 120 12 - Thorn 180 59 2 Co 3 O 4 Co(NO 3 ) 2 (0.5 g) + L-lysine (0.1246 g) + NaOH (0.1375 g) GCE 160 12 400 / 2 Nanoplates 212.92 60 3 Co 3 O 4 Co(NO 3 ) 2 (2 mM) + urea (10 mM) CC 120 6 350 / 1 Nanosheets 8506 61 4 Co 3 O 4 @G Co(NO 3 ) 2 (1 mM) + GO (40 mg) + ethylene diamine GCE 90 12 350 / 1 Flower-like microsphere 628 62 5 Co 3 O 4 / GOH C 4 H 6 CoO 4 (0.58 g) + urea (0.12 g) + PVP (0.05 g) + aq. GO slurry (10 mL) GCE 105 2 - 36 300 /1 Nanoflowers 492.8 63 6 ZnCo 2 O 4 Zn(NO 3 ) 2 (0.010 g, 0.03 mM) + Co(NO 3 ) 2 (0.0189 g, 0.06 mM) + p-phthalic acid (0.012 g,0.07 mM) + PVP (K30, 0.92 g) + DMF (5.0 mL) + ethanol (3.0 mL) GCE 160 3 400 / 2 Micro-rice 436.1 64