. 2022 Feb 15;12(9):5428–5438. doi: 10.1039/d1ra06133j

Chemical synthesis method, grain size and thermal conductivity (W m⁻¹ K⁻¹), figure of merit (ZT) at 700 K of nanoparticles thermoelectric materials.

No.	Chemical synthesis method	Approach	Materials	Grain size (nm)	Thermal conductivity, κ (W m⁻¹ K⁻¹), figure of merit (ZT) at 700 K	References
1	Microwave irradiation method	N	(Zn_0.98Al_0.02)O	24.1	∼2.2, ZT ∼ 0.03	53 and 55
2	Solution method	N	(Zn_0.98Al_0.02)O	∼90	∼3.2, ZT ∼ 0.08	42, 54–56
3	Sol–gel method	NN	ZnO	100–2000	∼11.3, ZT ∼ 0.0016	25, 57–59 and 70
3	Sol–gel method	NN	(Zn_0.95Al_0.02)O	100	∼10, ZT ∼ 0.15	25, 57–59 and 70
4	RF plasma processing technique	NN	ZnO	2520	∼12, ZT ∼ 0.002	54 and 60
4	RF plasma processing technique	NN	(Zn_0.98Al_0.02)O	850	∼13, ZT ∼ 0.01	54 and 60
5	Solid-state reaction method	NN	(Zn_0.98Bi_0.02)O	2000–6000	∼15, ZT ∼ 0.05	61 and 62

Chemical synthesis method, grain size and thermal conductivity (W m−1 K−1), figure of merit (ZT) at 700 K of nanoparticles thermoelectric materials.