[1] KULWICKI B M. Humidity sensors[J]. Journal of the American Ceramic Society, 1991, 74:697-708.
[2] TAI H L, WANG S, DUAN Z H, et al. Evolution of breath analysis based on humidity and gas sensors: potential and challenges[J]. Sensors and actuators B: chemical, 2020, 318:128104.
[3] KILIC B, CELIK V. Self-assembled growth of tandem nanostructures based on TiO2 mesoporous/ZnO nanowire arrays and their optoelectronic and photoluminescence properties[J]. Applied physics A, 2015, 119:783-790.
[4] SHINDE S S, SHINDE P S, OH Y W, et al. Structural, optoelectronic, luminescence and thermal properties of Ga-doped zinc oxide thin films[J]. Applied surface science, 2012, 258:9969-9976.
[5] HSU S N F, CHANG M, HSU K T. Rapid synthesis of ZnO dandelion-like nanostructures and their applications in humidity sensing and photocatalysis[J]. Materials science in semiconductor processing, 2014, 21: 200-205.
[6] LI Y J, ZHANG H M. Research on the preparation and growth mechanism of ZnO micro/nano nails[J]. Optoelectronics letters, 2018, 14:248-251.
[7] PANDA S, BISWAS C, PAUL K S. A comprehensive review on the preparation and application of calcium hydroxyapatite : a special focus on atomic doping methods for bone tissue engineering[J]. Ceramics international, 2021, 47:28122-28144.
[8] BEZZI G, CELOTTI G, LANDI E, et al. A novel sol-gel technique for hydroxyapatite preparation[J]. Materials chemistry and physics, 2003, 78(3):816-824.
[9] RAGHUVEER V, MANTHIRAM A. Role of TiB2 and Bi2O3 additives on the recharge ability of MnO2 in alkaline cells[J]. Journal of power sources, 2006, 163: 598-603.
[10] LI P, ZHANG H Y, LI Z J, et al. Effect of surfactants on morphology, structure and photoluminescence properties of Eu-doped ZnO microsphere[J]. Optoelectronics letters, 2020, 16:293-297.
[11] KHAN H U, TARIQ M, SHAH M, et al. Designing and development of polyvinylpyrrolidone-tungsten trioxide (PVP-WO3) nanocomposite conducting film for highly sensitive, stable, and room temperature humidity sensing[J]. Materials science in semiconductor processing, 2021, 134:106053.
[12] YU Z J, KUMAR M R, SUN D L, et al. Large scale production of hexagonal ZnO nanoparticles using PVP as a surfactant[J]. Materials letters, 2016, 166:284-287.
[13] MA X S, WANG D H, CUI Y Z, et al. A novel hydrophilic conjugated polymer containing hydroxyl groups: syntheses and sensing performance for NACs in aqueous solution[J]. Sensors and actuators B:chemical, 2017, 251:851-857.
[14] YU S G, ZHANG H Y, CHEN C, et al. Investigation of humidity sensor based on Au modified ZnO nanosheets via hydrothermal method and first principle[J]. Sensors and actuators B:chemical, 2019, 287:526-534.
[15] ZHOU J, XIAO X, CHENG X F, et al. Surface modification of polysquaraines to sense humidity within a second for breath monitoring[J]. Sensors and actuators B: chemical, 2018, 271:137-146.
[16] XIE X J, SI R J, ZHENG J, et al. Synthesis of ZnO/NiO hollow spheres and their humidity sensing performance[ J]. Journal of alloys and compounds, 2021, 879: 160487.