High-quality diamond microparticles containing SiV centers grown by chemical vapor deposition with preselected seeds

Zhang, Tongtong; Gupta, Madhav; Jin, Jing; Wang, Zhongqiang; Guo, Xuyun; Yiu, Yau Chuen; Hui, Tony K.C.; Wang, Qi; Li, Kwai Hei; Chu, Zhiqin

doi:10.1039/d2tc01090a

Cited by 11 publications

(13 citation statements)

References 39 publications

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“…The adopted samples were nano-/ microdiamonds containing ensemble SiV centers, which were fabricated by the chemical vapor deposition (CVD) method using salt-assisted air-oxidized (SAAO) nanodiamonds, as detailed in our previous study. 37 A scanning electron microscopy (SEM) picture of the samples is shown in Figure 2b. The average size of NDs is around 1 μm.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…Next, we started to investigate the performance of thermometry for single NDs with SiV centers under two-photon excitation, as per the above instruction. We noticed in our previous work , that the conventional all-optical temperature measurement based on the spectrum approach was time-consuming (normally 50 s integration time for one nanoparticle), expensive, and not easily implemented. In addition, such a spectrum method was not compatible with widefield microscopy, as it was still quite challenging to rapidly and precisely measure spatially resolved spectral shifts using standard spectroscopy instruments.…”

Section: Resultsmentioning

confidence: 99%

“…In this paper, we explored the possibility of nanodiamond thermometry using a femtosecond pulsed laser with a center wavelength of 1064 nm. The adopted samples were nano-/microdiamonds containing ensemble SiV centers, which were fabricated by the chemical vapor deposition (CVD) method using salt-assisted air-oxidized (SAAO) nanodiamonds, as detailed in our previous study . A scanning electron microscopy (SEM) picture of the samples is shown in Figure b.…”

Section: Resultsmentioning

confidence: 99%

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Two-Photon Excitation of Silicon-Vacancy Centers in Nanodiamonds for All-Optical Thermometry with a Noise Floor of 6.6 mK·Hz^–1/2

Zhang

et al. 2023

J. Phys. Chem. C

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In this paper, we introduce ultrasensitive all-optical nanothermometry using high figure-of-merit nanodiamonds with silicon-vacancy (SiV) centers. In contrast to the commonly used single-photon process, we have adopted a two-photon approach to achieve efficient excitation of SiV centers in nanodiamonds. Based on the developed intensity-projected scheme, we have experimentally achieved a noise floor of 6.6 mK•Hz −1/2 using nanodiamonds. This serves as a new record of temperature resolution in the relevant field. Particularly, this simplified method allows us to reflect the temperature-induced spectral shift without wavelength scanning via a spectrometer. Furthermore, we demonstrate that the two-photon excitation of SiV centers has been thermally activated, as indicated by an elevated fluorescence intensity accompanied by a temperature increase. Our findings offer an opportunity for harnessing SiV-based nanothermometry in an easy-to-use manner and open the road for the development of practical applications in complicated environments such as living cells.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Two-Photon Excitation of Silicon-Vacancy Centers in Nanodiamonds for All-Optical Thermometry with a Noise Floor of 6.6 mK·Hz^–1/2

Zhang

et al. 2023

J. Phys. Chem. C

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“…We have recently demonstrated the fabrication of large-scale, high-quality diamond microparticles with SiV centers on the Si substrate using salt-assisted air-oxidized (SAAO) HPHT NDs as CVD seeds 51 . As shown in Fig.…”

Section: Fabrication Of the Diamond-puf Anti-counterfeiting Labelmentioning

confidence: 99%

“…1a), satisfying the critical requirement for fabricating PUF labels. In this work, we report a scalable, robust, trustworthy, and intelligent anti-counterfeiting strategy, using our previously developed high-quality CVD-grown diamond microparticles on heterogeneous substrates 51 . Compared with other most studied optical PUFs (e.g., plasmonic NPs 7 , organic dots 12 , quantum dots 14 , photonic crystals 18 , perovskite NPs 27 , and upconversion NPs 31 ), the developed diamond PUFs exhibit excellent performance in respects such as capacity, diversity, safety, manufacturability, robustness and compatibility (Fig.…”

Section: Introductionmentioning

confidence: 99%

Manufacturing unclonable anti-counterfeiting labels using robust diamond microparticles on heterogeneous substrates

Zhang

Wang

et al. 2022

Preprint

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The growing prevalence of counterfeit products worldwide poses serious threats to economic security and human health. Developing advanced encryption materials with physical unclonable functions offers an attractive defense against counterfeiting. Here, we have successfully developed multimodal, dynamic and unclonable anti-counterfeiting labels based on high-quality diamond microparticles containing silicon-vacancy (SiV) centers. These chaotic microparticles were heterogeneously grown on silicon substrate by chemical vapor deposition, facilitating scalable and massive fabrication at low cost. Due to the non-deterministic nature of this growth method, the intrinsically unclonable function has been introduced by the randomized features of each individual particle. In particular, the extremely stable signals of SiV photoluminescence (PL) and light scattering from diamond microparticles are shown to enable high-capacity optical encryption. Moreover, time-dependent encryption has been achieved by dynamically modulating the SiV PL signals and/or controlling packed patterns of diamond microparticles via post air oxidation. Exploiting the robustness of diamond, the developed diamond-based labels exhibit ultrahigh stability in different extreme application scenarios, including harsh chemical environments, high temperature, mechanical abrasion, and UV light irradiation. Our proposed system, with its extreme randomness, multimode and dynamic encryption capability and outstanding robustness, can be practically applied immediately as anti-counterfeiting labels in diverse fields.

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A Diamond Heater‐Thermometer Microsensor for Measuring Localized Thermal Conductivity: A Case Study in Gelatin Hydrogel

Ma,

Zhang,

Hao

et al. 2024

Advanced Optical Materials

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Understanding the microscopic thermal effects of the hydrogel is important for its application in diverse fields, including thermal‐related studies in tissue engineering and thermal management for flexible electronic devices. In recent decades, localized thermal properties, such as thermal conductivity, have often been overlooked due to technical limitations. To tackle this, the study proposes a new hybrid diamond microsensor that is capable of simultaneous temperature control and readout in a decoupled manner. Specifically, the sensor consists of a silicon pillar (heater) at ≈10 microns in length, topped by a micron‐sized diamond particle that contains silicon‐vacancy (SiV) centers (thermometer) with 1.29 temperature measurement sensitivity. Combining this innovative, scalable sensor with a newly established simulation model that can transform heating‐laser‐induced temperature change into thermal conductivity, an all‐optical decoupled method is introduced with ≈0.05 W m−1 K−1 precision, which can reduce laser crosstalk. For the first time, the thermal conductivity change of hydrogels during the gelation process is tracked and the existence of variation is demonstrated. The study introduces a rapid, undisturbed technique for measuring microscale thermal conductivity, potentially serving as a valuable tool for cellular thermometry, and highlights the idea that decoupling can reduce crosstalk from different lasers, which is helpful for quantum sensing.

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High-quality diamond microparticles containing SiV centers grown by chemical vapor deposition with preselected seeds

Abstract: The superior properties of diamond have made it a versatile platform for many promising applications in a wide range of areas. Thus, various methods, like chemical vapor deposition (CVD), have...

Cited by 11 publications

References 39 publications

Two-Photon Excitation of Silicon-Vacancy Centers in Nanodiamonds for All-Optical Thermometry with a Noise Floor of 6.6 mK·Hz^–1/2

Two-Photon Excitation of Silicon-Vacancy Centers in Nanodiamonds for All-Optical Thermometry with a Noise Floor of 6.6 mK·Hz^–1/2

Manufacturing unclonable anti-counterfeiting labels using robust diamond microparticles on heterogeneous substrates

A Diamond Heater‐Thermometer Microsensor for Measuring Localized Thermal Conductivity: A Case Study in Gelatin Hydrogel

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High-quality diamond microparticles containing SiV centers grown by chemical vapor deposition with preselected seeds

Abstract: The superior properties of diamond have made it a versatile platform for many promising applications in a wide range of areas. Thus, various methods, like chemical vapor deposition (CVD), have...

Cited by 11 publications

References 39 publications

Two-Photon Excitation of Silicon-Vacancy Centers in Nanodiamonds for All-Optical Thermometry with a Noise Floor of 6.6 mK·Hz–1/2

Two-Photon Excitation of Silicon-Vacancy Centers in Nanodiamonds for All-Optical Thermometry with a Noise Floor of 6.6 mK·Hz–1/2

Manufacturing unclonable anti-counterfeiting labels using robust diamond microparticles on heterogeneous substrates

A Diamond Heater‐Thermometer Microsensor for Measuring Localized Thermal Conductivity: A Case Study in Gelatin Hydrogel

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Product

Resources

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Two-Photon Excitation of Silicon-Vacancy Centers in Nanodiamonds for All-Optical Thermometry with a Noise Floor of 6.6 mK·Hz^–1/2

Two-Photon Excitation of Silicon-Vacancy Centers in Nanodiamonds for All-Optical Thermometry with a Noise Floor of 6.6 mK·Hz^–1/2