B. J. Kim and co-workers describe novel photothermal nanoagents based on opto-thermally responsive block copolymer-MoS2 composites in article 1604403. The agents enable simultaneous photothermal heating and imaging of temperature profiles with superior stability and reversibility. Successful integration into organogel matrices demonstrates a potential as portable, selfmonitoring photothermal system suitable for biological and environmental applications.