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Solution Based 2-D Inorganic Material Synthesis

  • Solution Growth 

 A high degree of control over the size, structure, and composition of nanocrystals is essential to tune their chemical and physical properties for target applications. In particular, 2D nanocrystals of different sizes have been investigated extensively owing to their superior electrical, optical, and  thermal properties.  In reaction system, precursor, surfactant, reductant determines the final shape of synthesized materials due to different surface energies of different crystallographic planes.

  We aim to control the structure of synthesized materials by controlling reaction environment.

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  • On-substrate Synthesis

 Thin films of crystalline layer‐structured 2D materials have been studied for decades, as they exhibit a wide range of unique electrical, optical, thermal, and mechanical properties, which are not observed in their bulk counterparts. Those 2D thin films hold a great promise for a variety of applications in the field of future electronics, optics, energy storage, and catalysis.

 To obtain thin films of nanomaterials on desired substrates, elemental source(precursor) is first drop-casted or spin-coated on Si/ITO/FTO substrate. Next, substrate is heated using microwave oven or rapid thermal annealing(RTA) system to increase the temperature of substrate.  Heating induces precursor decomposition, chemical reaction, crystal development selectively on substrate, enabling thin film synthesis possible. Our interest is focused on transition metal dichalcogenides(TMDC; MoS2, WS2, MoSe2 ⋯) and metal oxides(HfO2, Al2O3 ⋯).

Microwave-assisted deposition

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Polymer-assisted deposition

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Adv. Mater., 2018, 30, 170577

Chem. Mater, 2018, 30, 2463-2473

Chem. Mater., 2017, 29, 5772-5776

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