Microfluidic device for controlled movement of material and a method for delivering a material from a microfluidic device

A method for delivering a material of interest from a microfluidic device having at least one cavity and a delivery orifice, said method comprising:

• dissolving a gaseous activation material at a relatively low temperature;
• inserting the dissolved gaseous activation material into the at least one cavity of the microfluidic device;
• maintaining the dissolved gaseous activation material at a relatively low temperature;
• and
• heating the dissolved gaseous activation material to cause the dissolved gaseous activation material to evolve into a gaseous state and expand, expansion of the gaseous activation material causing the material of interest to be delivered out of the delivery orifice.

A method for delivering a material of interest from a microfluidic device having a delivery orifice and an actuator, said method comprising:

• coating the material of interest with a protective layer that is water insoluble and removable by an enzyme;
• combining the coated material of interest into an activation material;
• inserting the activation material with the coated material of interest into the microfluidic device;
• and
• initiating an actuation sequence, the actuation sequence causing the activation material to expand and forcing the activation material and the coated material of interest to be delivered from the microfluidic device.