Neural interfaces, which allow for information to be transmitted directly from the brain to a computer, are getting closer to becoming a reality and are no longer just a concept from science fiction films. However, there are still many challenges and limitations to creating biocompatible devices that are similar in properties to natural human nervous tissue. First and foremost, implantable electrodes need to be safe. They need to be made of inert materials that do not cause mechanical damage to nerve tissue. This is a challenge because hard metals are often used to create conductors, but softer silver devices can oxidize over time and release silver ions, which can be toxic in high concentrations.