I recommend the following recent articles in the topic of IoT and its applications that have received a lot of attention.
I also urge that you look through journal and research databases to discover what kind of articles are published in the field of IoT.
Please see the following link for a list of journal databases:
Li, H., Ota, K., & Dong, M. (2018). Learning IoT in edge: deep learning for the internet of things with edge computing. IEEE Network, 32(1), 96-101.
Farahani, B., Firouzi, F., Chang, V., Badaroglu, M., Constant, N., & Mankodiya, K. (2018). Towards fog-driven IoT eHealth: Promises and challenges of IoT in medicine and healthcare. Future Generation Computer Systems, 78, 659-676.
Guedalia, Isaac David, Jacob Guedalia, Ravinder Paul Chandhok, and Sarah Glickfield. “Methods to discover, configure, and leverage relationships in internet of things (IoT) networks.” U.S. Patent 9,900,171, issued February 20, 2018.
Khan, M. A., & Salah, K. (2018). IoT security: Review, blockchain solutions, and open challenges. Future Generation Computer Systems, 82, 395-411.
Stergiou, C., Psannis, K. E., Kim, B. G., & Gupta, B. (2018). Secure integration of IoT and cloud computing. Future Generation Computer Systems, 78, 964-975.
Novo, O. (2018). Blockchain meets IoT: An architecture for scalable access management in IoT. IEEE Internet of Things Journal, 5(2), 1184-1195.
Li, S., Da Xu, L., & Zhao, S. (2018). 5G Internet of Things: A survey. Journal of Industrial Information Integration, 10, 1-9.
Long-range communications in unlicensed bands: the rising stars in the IoT and smart city scenarios, IEEE Wireless Communications
Anawar, M. R., Wang, S., Azam Zia, M., Jadoon, A. K., Akram, U., & Raza, S. (2018). Fog computing: An overview of big IoT data analytics. Wireless Communications and Mobile Computing, 2018.
The Internet of Things (IoT): Applications, investments, and challenges for enterprises, Business Horizons, Volume 58, Issue 4, July–August 2015, Pages 431-440
Internet of Things (IoT): A Vision, Architectural Elements, and Future Directions