Table 1
List of the most relevant experimental conditions in the electrospray deposition of 360-nm polystyrene nanospheres
Distance (cm)	Needle's voltage (V)	Sample's voltage (V)	Deposition rate (ml/h)	Conductivity (μS)	Dissolution	Qualitative assessment
10	10,000	−2,350	0.41	8.35	50:50 isopropanol/water nanopolystyrene	Few dispersed nanospheres
10	7,500	−2,500	0.74	8.35	50:50 isopropanol/water nanopolystyrene	Few dispersed nanospheres
10	14,000	0	1.3	350	Water nanopolystyrene	Few dispersed nanospheres
14	14,000	0	0.3	350	Water nanopolystyrene	Few dispersed nanospheres
14,5	11,570	0	2	350	Water nanopolystyrene	Lots of dispersed nanospheres
14,5	9,000	−1,000	0.2	350	Water nanopolystyrene	Few dispersed nanospheres
14,5	9,000	−1,000	0.2	350	Water nanopolystyrene	Few dispersed nanospheres
14	9,000	−1,000	0.6	4,100	50:50 water nanopolystyrene/distilled water + 1.5% formic acid	Semi-covered layer of scattered nanospheres
14	9,000	−1,000	2.2	350	Water nanopolystyrene	Tens of 3D ordered layers

In all the processes, the humidity was monitored during deposition and typically was 20%.

Coll et al. Nanoscale Research Letters 2013 8:26   doi:10.1186/1556-276X-8-26