Which microscopy technique, commercialized as a product in the early 2000s, broke the diffraction barrier and allowed scientists to visualize cellular structures at nanometer resolution?

The advancement of scientific instruments has dramatically changed our understanding of the world. One particular innovation in microscope technology created a paradigm shift in cellular biology research, winning a Nobel Prize and transforming how scientists visualize molecular processes. Test your knowledge about this groundbreaking scientific product that revolutionized microscopy beyond the diffraction limit.

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STED (Stimulated Emission Depletion) microscopy
Electron Tunneling microscopy
Quantum Resonance Imaging (QRI)
Molecular Force Detection (MFD) microscopy