**3. Conclusion**

This chapter is a timely content of nanoemulsion development as this research field has shown significant publication output for the past decade due to growing interest as a result of nanotechnology development as seen in **Figure 3** using Web of Knowledge (Thomson Reuters) online search engine [15]. Presently, microemulsionrelated publication is dominating in terms of publications output per year. This is in line with the history of microemulsion for the past seven decades which covers a comprehensive research range from science (i.e., chemistry, biology, physics, etc.) to engineering (chemical, biomedical, environmental, etc.). On the contrary, nanoemulsions received much lesser focus until the mid-1990s. It has relative incomplete fundamental knowledge understanding in terms of properties, characterizations and fabrication methods, and it also has limited applications presently. Therefore, this book is important in attempting to mend the knowledge gap and form the trend. As nanotechnology matures gradually, the outlook of nanoemulsion looks bright and it aims to stretch its capability to apply across different fields that will benefit mankind.

#### *Nanoemulsions - Properties, Fabrications and Applications*

#### **Figure 3.**

*Comparison between 'microemulsion' and 'nanoemulsion' in terms of publication per year using Web of Knowledge online search engine in May 2019.*
