The Ever-Shrinking Spectrometer: New Technologies and Applications

Crocombe, Richard A.

doi:10.1007/978-981-19-4884-8_2

Cited by 2 publications

(2 citation statements)

References 20 publications

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“…Adapted from [13], with permission. Information assembled from [11,148,149]. In each technique, the higher priced variants are more fully integrated and targeted towards specific applications, may offer 24/7 support, ongoing library or database upgrades, etc.…”

Section: F I G U R 1mentioning

confidence: 99%

Field‐portable detection of fentanyl and its analogs: A review

Crocombe,

Giuntini,

Schiering

et al. 2023

Journal of Forensic Sciences

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The need to detect fentanyl and its analogs in the field is an important capability to help prevent unintentional exposure or overdose on these substances, which may result in death. Many portable methods historically used in the field by first responders and other field users to detect and identify other chemical substances, such as hazardous materials, have been applied to the detection and identification of these synthetic opioids. This paper describes field portable spectroscopic methods used for the detection and identification of fentanyl and its analogs. The methods described are automated colorimetric tests including lateral flow assays; vibrational spectroscopy (mid‐infrared and Raman); gas chromatography–mass spectrometry; ion mobility spectrometry, and high‐pressure mass spectrometry. In each case the background and key details of these technologies are outlined, followed by a discussion of the application of the technology in the field. Attention is paid to the analysis of complex mixtures and limits of detection, including the required spectral databases and algorithms used to interrogate these types of samples. There is also an emphasis on providing actionable information to the (likely) non‐scientist operators of these instruments in the field.

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Section: F I G U R 1mentioning

confidence: 99%

Field‐portable detection of fentanyl and its analogs: A review

Crocombe,

Giuntini,

Schiering

et al. 2023

Journal of Forensic Sciences

View full text Add to dashboard Cite

show abstract

“…A number of other emerging optical technologies, 20 especially those which will be manufactured in high volumes may impact miniature spectrometers: very low cost lasers (VCSELs) 21 used for facial recognition in smartphones; single photon counting avalanche diode (SPAD) arrays (possible applications in time-of-flight array detectors, timegated Raman, time-resolved fluorescence and laser-induced breakdown spectroscopy); quantum dot wavelengthselective detectors; microbolometer arrays incorporated into smartphones; and meta-materials in general. 22 Some other developments from high-volume photonic applications include: automotive LiDAR (highly-integrated, lowcost, systems with modulated lasers, time-of-flight detectors, etc. ); optical coherence tomography with fast sweptwavelength lasers; and "tunable detectors" (electronically changing or modulating the wavelength to which a detector is sensitive).…”

Section: Further Miniaturization Of Spectroscopic Devicesmentioning

confidence: 99%

Miniature and multi-spectral spectrometers in consumer goods and wearables

Crocombe¹

2023

MOEMS and Miniaturized Systems XXII

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In the past twenty years optical spectrometers have shrunk dramatically in size, giving us successively laboratoryportable, toaster-sized, instruments; cordless-drill-sized portable instruments for use in the field; and onto spectrometers the size of a computer mouse or deck of cards. The latest development in portable spectroscopy is the availability of very low-cost multispectral sensors, the size of computer chips, leading to the possibility of embedding them into consumer goods, including personal health monitoring, and eventually into medical products. The width of absorption bands in the visible and near-infrared regions for condensed phase samples imply that an instrument with a small number of resolution elements will be able to perform routine analyses, and that spectral range is a more important parameter than spectral resolution. Multispectral sensors can now be incorporated into 'fitness' products like smart watches and sports watches, and as photonic miniaturization increases, into 'wearables' like smart rings providing the user with health information. Multispectral devices can be produced in volume via semiconductor and optical coating techniques, at very low cost -less than $10 each. Silicon photonics and photonic integrated circuits (PICs), produced en masse using semiconductor manufacturing techniques, are the ideal next step. This paper surveys the field and highlights some 'smart' consumer device possibilities from toothbrushes to toilets.

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The Ever-Shrinking Spectrometer: New Technologies and Applications

Cited by 2 publications

References 20 publications

Field‐portable detection of fentanyl and its analogs: A review

Field‐portable detection of fentanyl and its analogs: A review

Miniature and multi-spectral spectrometers in consumer goods and wearables

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