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1. Vapor–liquid assisted chemical vapor deposition of Cu ₂ X materials

   https://doi.org/10.1088/2053-1583/ac8435  

   Shehzad, M Arslan; Lee, Yea-Shine; Cheng, Matthew; Lebedev, Dmitry; Tyner, Alexander C; Das, Paul Masih; Gao, Zhangyuan; Goswami, Pallab; dos Reis, Roberto; Hersam, Mark C; et al (August 2022, 2D Materials)

   Abstract Transition metal dichalcogenides (TMDs) are known for their layered structure and tunable functional properties. However, a unified understanding on other transition metal chalcogenides (i.e. M 2 X) is still lacking. Here, the relatively new class of copper-based chalcogenides Cu 2 X (X = Te, Se, S) is thoroughly reported. Cu 2 X are synthesized by an unusual vapor–liquid assisted growth on a Al 2 O 3 /Cu/W stack. Liquid copper plays a significant role in synthesizing these layered systems, and sapphire assists with lateral growth and exfoliation. Similar to traditional TMDs, thickness dependent phonon signatures are observed, and high-resolution atomic images reveal the single phase Cu 2 Te that prefers to grow in lattice-matched layers. Charge transport measurements indicate a metallic nature at room temperature with a transition to a semiconducting nature at low temperatures accompanied by a phase transition, in agreement with band structure calculations. These findings establish a fundamental understanding and thrust Cu 2 Te as a flexible candidate for wide applications from photovoltaics and sensors to nanoelectronics. 

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2. Vapor condensation with daytime radiative cooling

   Ming Zhou, Haomin Song (January 2021, Proceedings of the National Academy of Sciences of the United States of America)

   null (Ed.)
3. Perspective: Highly stable vapor-deposited glasses

   https://doi.org/10.1063/1.5006265  

   Ediger, M. D. (December 2017, The Journal of Chemical Physics)
4. Vapor condensation with daytime radiative cooling

   https://doi.org/10.1073/pnas.2019292118  

   Zhou, Ming; Song, Haomin; Xu, Xingyu; Shahsafi, Alireza; Qu, Yurui; Xia, Zhenyang; Ma, Zhenqiang; Kats, Mikhail A.; Zhu, Jia; Ooi, Boon S.; et al (March 2021, Proceedings of the National Academy of Sciences)

   A radiative vapor condenser sheds heat in the form of infrared radiation and cools itself to below the ambient air temperature to produce liquid water from vapor. This effect has been known for centuries, and is exploited by some insects to survive in dry deserts. Humans have also been using radiative condensation for dew collection. However, all existing radiative vapor condensers must operate during the nighttime. Here, we develop daytime radiative condensers that continue to operate 24 h a day. These daytime radiative condensers can produce water from vapor under direct sunlight, without active consumption of energy. Combined with traditional passive cooling via convection and conduction, radiative cooling can substantially increase the performance of passive vapor condensation, which can be used for passive water extraction and purification technologies. 

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5. Dielectric properties of vapor-deposited propylbenzenes

   https://doi.org/10.1063/1.5125138  

   Riechers, Birte; Guiseppi-Elie, A.; Ediger, M. D.; Richert, Ranko (November 2019, The Journal of Chemical Physics)