A method for detecting an enthalpy change includes providing a first mixture and a second mixture to a drop generator. The first mixture includes a ligand. The second mixture contains a target molecule. The method further includes generating a drop in the drop generator. The drop includes the target molecule, a temperature-sensitive reporter compound, and the ligand. The method also includes measuring a property of the temperature-sensitive reporter compound in the drop to determine an amount of enthalpy change that has occurred.