There are nurse researchers that do exactly what you describe.
Know that to head up many of the projects, you'll need advanced degrees and to be affiliated with teaching facilities. With evidence-based-practice taking over like a storm, there's definitely a demand. However, a big caveat being overall tighter budgets to fund your projects (and to pay your salary). Think Clinical Nurse Specialist, Nurse Practitioner, DNS and heck, even CRNA. Each can have varying mixtures of clinical and research-based opportunities.
Even as a bedside RN, there are projects ongoing all over that you would be involved in to a lesser degree. Again, look to teaching facilities, especially those associated with universities.
In the meanwhile, why not consider a specialty area like critical care (since you noted you're already in ED and bored) LOTS for a new nurse there learn before he/she could even think about being bored. Being a newer RN, watch a good CTICU team land a fresh heart pt and tell me if you're bored then