“An Injectable Chitosan-Based Self-Healable Hydrogel System as an Antibacterial Wound Dressing”
by Xiaoyu Wang, Rijian Song, Melissa Johnson, Sigen A, Zhonglei He, Cameron Milne, Xianqing Wang, Irene Lara-Sáez, Qian Xu and Wenxin Wang
Materials 2021, 14(20), 5956; https://doi.org/10.3390/ma14205956
Available online: https://www.mdpi.com/1996-1944/14/20/5956

 “Current Trends in Automotive Lightweighting Strategies and Materials”
by Frank Czerwinski
Materials 2021, 14(21), 6631; https://doi.org/10.3390/ma14216631
Available online: https://www.mdpi.com/1996-1944/14/21/6631

“Additively Manufactured Zirconia for Dental Applications”
by Hiroto Nakai, Masanao Inokoshi, Kosuke Nozaki, Keiji Komatsu, Shingo Kamijo, Hengyi Liu, Makoto Shimizubata, Shunsuke Minakuchi, Bart Van Meerbeek, Jef Vleugels et al.
Materials 2021, 14(13), 3694; https://doi.org/10.3390/ma14133694
Available online: https://www.mdpi.com/1996-1944/14/13/3694

“A Stretchable, Self-Healable Triboelectric Nanogenerator as Electronic Skin for Energy Harvesting and Tactile Sensing”
by Xi Han, Dongjie Jiang, Xuecheng Qu, Yuan Bai, Yu Cao, Ruizeng Luo and Zhou Li
Materials 2021, 14(7), 1689; https://doi.org/10.3390/ma14071689
Available online: https://www.mdpi.com/1996-1944/14/7/1689

 “Additive Manufacturing Processes in Medical Applications”
by Mika Salmi
Materials 2021, 14(1), 191; https://doi.org/10.3390/ma14010191
Available online: https://www.mdpi.com/1996-1944/14/1/191

 “Behaviour and Properties of Eco-Cement Pastes Elaborated with Recycled Concrete Powder from Construction and Demolition Wastes”
by Laura Caneda-Martínez, Manuel Monasterio, Jaime Moreno-Juez, Sagrario Martínez-Ramírez, Rosario García and Moisés Frías
Materials 2021, 14(5), 1299; https://doi.org/10.3390/ma14051299
Available online: https://www.mdpi.com/1996-1944/14/5/1299

 “Antioxidants: Classification, Natural Sources, Activity/Capacity Measurements, and Usefulness for the Synthesis of Nanoparticles”
by Jolanta Flieger, Wojciech Flieger, Jacek Baj and Ryszard Maciejewski
Materials 2021, 14(15), 4135; https://doi.org/10.3390/ma14154135
Available online: https://www.mdpi.com/1996-1944/14/15/4135

 “Charge Carrier Processes and Optical Properties in TiO₂ and TiO₂-Based Heterojunction Photocatalysts: A Review”
by Stefano Lettieri, Michele Pavone, Ambra Fioravanti, Luigi Santamaria Amato and Pasqualino Maddalena
Materials 2021, 14(7), 1645; https://doi.org/10.3390/ma14071645
Available online: https://www.mdpi.com/1996-1944/14/7/1645

 “Properties and Classification of Diamond-Like Carbon Films”
by Naoto Ohtake, Masanori Hiratsuka, Kazuhiro Kanda, Hiroki Akasaka, Masanori Tsujioka, Kenji Hirakuri, Atsushi Hirata, Tsuguyori Ohana, Hiroshi Inaba, Makoto Kano et al.
Materials 2021, 14(2), 315; https://doi.org/10.3390/ma14020315
Available online: https://www.mdpi.com/1996-1944/14/2/315

 “Thermal Conductivity and Viscosity: Review and Optimization of Effects of Nanoparticles”
by Kevin Apmann, Ryan Fulmer, Alberto Soto and Saeid Vafaei
Materials 2021, 14(5), 1291; https://doi.org/10.3390/ma14051291
Available online: https://www.mdpi.com/1996-1944/14/5/1291