Abstract Perovskite is usually referred to as a kind of ceramic oxide, its general molecular formula is ABX3, whose name comes from the mineral perovskite of the same name (CaTiO3). Due to the stable and easily regulated structural properties of these compounds, which shows unique physical and chemical properties. Especially the perovskites oxides ABO3, its unique electrical, magnetic, high redox and electro- catalysis features and so on, which can be used in electromagnetic material, battery, sensor, high temperature heating material and catalyst, etc. It has been a research hotspot in the fields of chemistry, physics and materials. Recently, the hexagonal rare-earth indates REInO3 invoked people's interest since the discovery of the improper geometric ferroelectricity and potential quantum spin liquids (QSL) behavior. Hence, we synthesized the high-quality single crystals of GdInO3. The crystal structure and magnetic property of the quasi-two-dimensional hexagonal rare-earth indium oxides GdIn03 have been studied by combing experiments and model calculations. The two inequivalent Gd3+ ions form the centered honeycomb lattice, which consists of honeycomb and triangular sublattices. The dc magnetic susceptibility and specific heat measurements suggest two antiferromagnetic phase transitions at TN1 = 2.3 K and TN2 = 1.02 K. An inflection point is observed in the isothermal magnetization curve, which can be an indication of an up-up-down phase with a 1/3 magnetization plateau, further supported by our theoretical calculation. We also observe a large magnetic entropy change originated from the magnetic frustration in GdInO3. By considering a classical spin Hamiltonian, we establish the ground state phase diagram, which suggests that GdInO3 has a weak easy-axis anisotropy and is close to the equilateral triangular-lattice system. The theoretical ground-state phase diagram may be used as a reference in NMR, ESR, or μSR experiments in future. After substituting Gd with Eu, we synthesized another high-quality single crystal of EuInO3, we investigate the structural and magnetic properties in single crystals of EuInO3 combining x-ray diffraction, dc magnetic susceptibility, and heat capacity measurements. We find that the EuInO3 has the similar quasi 2D crystal structure characteristics with frustrated magnet GdInO3 and is a highly anisotropic Van Vleck paramagnet. In another work, we generated a single crystal of two-dimensional layered α-MoO2 using a simple technique of physical vapor deposition (PVD) method. By adjusting the growth temperature, the thickness of α-MoO2 single crystals can be tuned to sub ten nanometers. High-resolution transmission electron microscopy (HRTEM) images verified the atomic structural details of PVD grown orthorhombic MoO2 (α-M002) nanosheet with high quality. Additionally, the unsaturated linear magnetic range (LMR) in the grown nanosheets is up to 5 T. Also, α-MoO2 nanosheet with low defect displays excellent conductivity that is comparable to metal silver. Thus, this new nanomaterial can show a promising application as potential 2D conductors.