The invention described herein provides methods for the detection of
soluble antigens. In particular, the methods provide for the detection of
soluble proteins and chemicals. In addition, the invention provides
methods of detecting a nucleic acid sequence in a sample. Also described
is an emittor cell comprising an Fc receptor and an emittor molecule for
the detection of a target particle in a sample wherein the target
particle to be detected is bound by one or more antibodies. Also provided
is an optoelectronic sensor device for detecting a target particle in a
plurality of samples.