C ONTENTS P REFACE TO C HEMICAL S ENSORS : F UNDAMENTALS OF S ENSING M ATERIALS P REFACE TO V OLUME 2: N ANOSTRUCTURED M ATERIALS A BOUT THE E DITOR C ONTRIBUTORS 1 I NTRODUCTION TO N ANOMATERIALS AND N ANOTECHNOLOGY G. Korotcenkov B. K. Cho 1 What Are Nanomaterials? 2 A Brief History of Nanotechnology 3 What Distinguishes Nanomaterials from Bulk Materials? 4 Nanomaterials Manufacturing 5 Nanotechnology and Its Possibilities 6 Nanotechnology: Future Trends 7 Acknowledgments References 2 Q UASI -O NE -D IMENSIONAL M ETAL O XIDE S TRUCTURES : S YNTHESIS , C HARACTERIZATION , AND A PPLICATION AS C HEMICAL S ENSORS Pai-Chun Chang Dongdong Li Jia G. Lu 1 Introduction 2 Synthesis of Q1D Nanomaterials xi xiii xv xvii 1 1 7 10 14 17 19 23 24 29 29 30 v