Progress in nanomaterials: Synthesis, characterization, and applications

Nanomaterials have emerged as transformative mediators across diverse scientific and engineering disciplines owing to their exceptional physicochemical properties, tuneable morphologies, and multifunctional capabilities. This review presents a systematic and comparative exploration of contemporary nanomaterial research, with a focus on synthesis methodologies, advanced characterization techniques, and cross-domain applications. Nanomaterials are classified by dimensionality, composition, and morphology, followed by an in-depth analysis of conventional and emerging synthesis strategies, including green chemistry and precision approaches such as atomic layer deposition. Special emphasis is placed on the interplay between synthesis conditions and resulting material functionalities, particularly in nanocomposite systems designed for enhanced performance and sustainability. Advanced characterization tools such as electron microscopy and spectroscopic techniques are discussed to elucidate structure-property relationships. The review further surveys the expanding landscape of applications in energy, biomedicine, environmental remediation, and smart functional systems. By integrating synthesis, characterization, and real-world deployment in a unified framework, this work addresses current gaps in the literature and offers insights for future research in sustainable and application-driven nanotechnology. • Classified nanomaterials by size, shape, and composition for better insight. • Reviewed top-down and bottom-up synthesis methods in detail. • Linked synthesis methods to key material properties and functions. • Covered broad applications and future research directions of nanomaterials.