Infrared Microscopy: A Multidisciplinary Review of Techniques, Applications, and Ethical Dimensions

Infrared microscopy has become a significant analytical technique with a transformative impact on various scientific disciplines. This review examines its applications in biomedical research, materials science, environmental monitoring, and art conservation. The non-invasive and label-free technique has revolutionized disease diagnostics, drug discovery, and tissue engineering by providing comprehensive molecular and cellular insights. In materials science, it has significantly advanced understanding of microstructure and material properties, facilitating the development of novel materials. In environmental monitoring, infrared microscopy plays a crucial role in assessing microplastics and atmospheric pollutants, supporting environmental protection efforts. In art preservation, the technique offers valuable insights into the composition and deterioration of historical artworks. Recent advancements in sensor technology, particularly InGaAs and graphene-based detectors, coupled with artificial intelligence and machine learning, have greatly enhanced image analysis capabilities. The review identifies key challenges such as surpassing the diffraction limit and interpreting complex data. Ethical concerns, including data privacy and equitable access to technology, are also emphasized. Infrared microscopy remains a vital tool for advancing scientific knowledge and practical applications. Its impact is poised to expand with future technological developments, contingent upon addressing both technological challenges and ethical considerations.