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6CCVD Research

Small multimodal thermometry with detonation-created multi-color centers in detonation nanodiamond

At a Glance

Section titled ā€œAt a Glanceā€
MetadataDetails
Publication Date2024-05-01
JournalAPL Materials
AuthorsFrederick T.-K. So, Nene Hariki, Masaya Nemoto, Alexander I. Shames, Ming Liu
InstitutionsKyoto University, Tokyo Institute of Technology
Citations6

Abstract

Section titled ā€œAbstractā€

Detonation nanodiamond (DND) is the smallest class of diamond nanocrystal capable of hosting various color centers with a size akin to molecular pores. Their negatively charged nitrogen-vacancy center (NVāˆ’) is a versatile tool for sensing a wide range of physical and even chemical parameters at the nanoscale. The NVāˆ’ is, therefore, attracting interest as the smallest quantum sensor in biological research. Nonetheless, recent NVāˆ’ enhancement in DND has yet to yield sufficient fluorescence per particle, leading to efforts to incorporate other group-IV color centers into DND. An example is adding a silicon dopant to the explosive mixture to create negatively charged silicon-vacancy centers (SiVāˆ’). In this paper, we report on efficient observation (āˆ¼50% of randomly selected spots) of the characteristic optically detected magnetic resonance (ODMR) NVāˆ’ signal in silicon-doped DND (Si-DND) subjected to boiling acid surface cleaning. The NVāˆ’ concentration is estimated by continuous-wave electron spin resonance spectroscopy to be 0.35 ppm without the NVāˆ’ enrichment process. A temperature sensitivity of 0.36K/Hz in an NVāˆ’ ensemble inside an aggregate of Si-DND is achieved via the ODMR-based technique. Transmission electron microscopy survey reveals that the Si-DNDs core sizes are āˆ¼11.2 nm, the smallest among the nanodiamondā€™s temperature sensitivity studies. Furthermore, temperature sensing using both SiVāˆ’ (all-optical technique) and NVāˆ’ (ODMR-based technique) in the same confocal volume is demonstrated, showing Si-DNDā€™s multimodal temperature sensing capability. The results of the study thereby pave a path for multi-color and multimodal biosensors and for decoupling the detected electrical field and temperature effects on the NVāˆ’ center.

Tech Support

Section titled ā€œTech Supportā€

Original Source

Section titled ā€œOriginal Sourceā€

References

Section titled ā€œReferencesā€
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