Air Traffic Control Fully Certified
Air Traffic Control Time Certified In Pos 1 (yrs) 9
Human-Machine Interface; Communication Breakdown; Confusion; Distraction; Situational Awareness
ATC Issue All Types; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Provided Assistance; Air Traffic Control Separated Traffic
ATC Equipment / Nav Facility / Buildings
Aircraft X was in normal hand-off status with PCTZ sector E1L.  The aircraft was on the correct code.  I was involved in separating aircraft that were stacked the wrong way and on bad routes coming from another sector within my area.  I noticed the approach controller did not take my hand-off yet and I called to make the hand-off.  After several failed attempts of reaching the controller I told the aircraft to execute a tight right 360 degree turn.  I then talked to the controller at PCTZ and they did not see the hand-off.  They saw a code and called the aircraft radar contact; but did not understand who it was or what they were doing.  I then talked to the controller about 10-15 minutes later and they said it was an ERAM issue. I should have asked for a d-side.
ZDC Controller tries to handoff an aircraft to PCT; but due to the use of ERAM; the receiving Controller did not see the handoff until the Center Controller called them.