Can we accelerate molecules to inject extremely small stream of molecules deep into the body? It is matter of question and interest if there is certain diameter of external object that can be pierced into the body without complications such as infection. The diameter should be very small. Therefore different mechanisms should be considered for injection. Here an ionic gun is imagined; a string like structure is injected deep into tissue by accelerating the ions that are attached at the tip of the string. these are so narrow in size that they can be injected with no complication. applications can be brain reading to all different types of external stimuli such as stimulation of pancreas. also it can be considered for treating cancer, or other non invasive surgery.