Abstract: The present invention is directed to devices for measuring reactions between a recognition element and a biological fluid (biomarker) to determine user well-being. The present invention features a sensor for analyzing a plurality of features of a reaction between an enzyme and a biomarker to measure a user's health. The sensor may comprise a substrate with an enzyme source and a drain. The enzyme source may comprise an enzyme path leading to a substrate surface to direct the enzyme to react with the biomarker to become a post-reaction mixture. The drain may comprise a drain path. The post-reaction mixture may travel from the substrate surface through the drain path to the drain. The sensor may further comprise an electronic gate disposed above the surface of the substrate for measuring the plurality of features. The sensor may be wearable on a skin surface of the user.

Abstract: Photodiodes configured to convert incident photons in the short-wave infrared (SWIR) to electric current, where the photodiodes have a PbS/PbClx core/shell nanocrystal absorber layer. The PbClx shell in the PbS/PbClx nanocrystals provide native passivation in the (100) crystal facets and enable removal of pre-device processing ligands and ligand exchange on the (111) crystal facets of the PbS/PbClx nanocrystals such that the photodiode exhibits reduced current densities under reverse bias and greater infrared photoresponse, providing improved device performance as compared to photodiodes having absorber layers formed from PbS core nanocrystals alone.

Abstract: Photodiodes configured to convert incident photons in the short-wave infrared (SWIR) to electric current, where the photodiodes have a PbS/PbClx core/shell nanocrystal absorber layer. The PbClx shell in the PbS/PbClx nanocrystals provide native passivation in the (100) crystal facets and enable removal of native ligands and ligand exchange on the (111) crystal facets of the PbS/PbClx nanocrystals such that the photodiode exhibits reduced current densities under reverse bias and greater infrared photoresponse, providing improved device performance as compared to photodiodes having absorber layers formed from PbS core nanocrystals alone.