The piezoelectric drop-on-demand (DOD) generator primarily consists of two components: one piezoelectric actuator and one silicon fluid chamber with uniform nozzles. When a voltage is applied, the piezoelectric actuator expands or contracts at a frequency of 250-300 kHz and squeezes droplets via nozzle arrays. The size and uniformity of droplets are mainly controlled by the driving frequency and  signal amplitude, the liquid feeding pressure,  the fluid properties (viscosity and surface tension etc) and the nozzle geometry. 

Key Features

• Generate micro droplets with known diameters and generation rate
• Low liquid pressure
• Less satellite droplets 
• Affordable and highly reproducible

Typical Applications

• Deposit biological fluids, ranging from single molecules (proteins, DNA, lipids) to tissue extracts and cells
• Single cell dispensing for drug screening assays and cell seeding in tissue engineering applications 
• Generation of lipid micro spheres for drug discovery 
• Dispense reagents for combinatorial synthesis, surface modification 
• Inkjet printing