{'fraction_non_alphanumeric': 0.017214397496087636, 'fraction_numerical': 0.003129890453834116, 'mean_word_length': 5.597938144329897, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Reduction of background signal in automated array biosensors

Automated sample and reagent delivery to planar microarrays requires the attachment of flow channels to the sensing surface. When evanescent measurements are required, the attachment of the flow chamber causes particular problems. The flow chamber scatters the excitation light, increasing the background signal above which the fluorescent signal must be detected. Introducing a light-absorbing material (carbon black) into the PDMS flow channels has been shown to decrease the measured background signal by 66%. The benefits of background image subtraction are also discussed.