A handheld smartphone-controlled spectrophotometer based on hue to wavelength conversion for molecular absorption and emission measurements

Oliveira, Helton Jader Souza de; Almeida, Pedro Lemos de; Sampaio, Bárbara Araújo; Fernandes, Julys Pablo Atayde; Pessoa-Neto, Osmundo Dantas; Lima, Edson Alves de; Almeida, Luciano F.

doi:10.1016/j.snb.2016.07.149

Cited by 50 publications

(33 citation statements)

References 36 publications

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“…Such devices have been applied in metabolomics applications, e.g., in terms of drug toxicity monitoring [ 46 ]. Hence, smartphone spectroscopy now offers the possibility to capture and analyse spectra at an unprecedented price point, with quoted build costs as low as $10 [ 29 ], based on the minimal associated materials costs, e.g., by using DVDs for the diffraction grating e.g., [ 28 ], and fabricating the device housings from readily available household materials [ 27 ], e.g., MDF [ 28 ], or more commonly with 3D printing e.g., [ 39 , 41 ]. The latter technology, in particular, with its capacity to manufacture highly customizable optical hardware, has been a major reason for the recent expansion in user-built smartphone spectrometers [ 26 ].…”

Section: Discussionmentioning

confidence: 99%

“…With these benefits in mind, a number of authors have performed comparisons against laboratory instrumentation applied in these application areas, with generally positive outcomes, e.g., Oliviera et al [ 28 ] note no statistically significant differences in absorption and emission measurements with their device vs. commercial spectrometers. Similarly, Long et al [ 32 ] compared their smartphone sensor absorption based enzyme assay approach to a conventional microplate reader, demonstrating detection limits, which were comparable or superior to those of the latter unit.…”

Section: Discussionmentioning

confidence: 99%

“…System spectral resolutions of 5–10 nm were reported, with an applied grating of 1000 lines/mm. This dual aperture approach was also adopted by Oliviera et al [ 28 ], who built an inexpensive medium density fibre-board (MDF) unit, using a DVD for the diffraction grating. A modularized design enabled both fluorescence and absorption based spectroscopic observations, with demonstrated applications in measurements of Fe 2+ and Na + in medicine and saline samples, respectively.…”

Section: Transmission Grating Configurationsmentioning

confidence: 99%

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Smartphone Spectrometers

McGonigle

Wilkes

Pering

et al. 2018

Sensors

127

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Smartphones are playing an increasing role in the sciences, owing to the ubiquitous proliferation of these devices, their relatively low cost, increasing processing power and their suitability for integrated data acquisition and processing in a ‘lab in a phone’ capacity. There is furthermore the potential to deploy these units as nodes within Internet of Things architectures, enabling massive networked data capture. Hitherto, considerable attention has been focused on imaging applications of these devices. However, within just the last few years, another possibility has emerged: to use smartphones as a means of capturing spectra, mostly by coupling various classes of fore-optics to these units with data capture achieved using the smartphone camera. These highly novel approaches have the potential to become widely adopted across a broad range of scientific e.g., biomedical, chemical and agricultural application areas. In this review, we detail the exciting recent development of smartphone spectrometer hardware, in addition to covering applications to which these units have been deployed, hitherto. The paper also points forward to the potentially highly influential impacts that such units could have on the sciences in the coming decades.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Transmission Grating Configurationsmentioning

confidence: 99%

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Smartphone Spectrometers

McGonigle

Wilkes

Pering

et al. 2018

Sensors

127

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show abstract

“…Interestingly, free Internet services like Internet.org (a Facebook‐led initiative) can even be accessed in many African and other countries (in Asia and Latin America) without a data plan which may further drive Internet‐enabled diagnostics. For example, among others, the imaging capabilities of smartphones have been exploited for the analysis of semen, iron concentration in blood or even amplification and fluorescent detection of genetic materials from viruses using disposable sampling and sensing elements. The detection capabilities of smartphones can also be extended beyond just imaging.…”

Section: Fields Of Applicationmentioning

confidence: 99%

Disposable Sensors in Diagnostics, Food, and Environmental Monitoring

et al. 2019

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Disposable sensors are low‐cost and easy‐to‐use sensing devices intended for short‐term or rapid single‐point measurements. The growing demand for fast, accessible, and reliable information in a vastly connected world makes disposable sensors increasingly important. The areas of application for such devices are numerous, ranging from pharmaceutical, agricultural, environmental, forensic, and food sciences to wearables and clinical diagnostics, especially in resource‐limited settings. The capabilities of disposable sensors can extend beyond measuring traditional physical quantities (for example, temperature or pressure); they can provide critical chemical and biological information (chemo‐ and biosensors) that can be digitized and made available to users and centralized/decentralized facilities for data storage, remotely. These features could pave the way for new classes of low‐cost systems for health, food, and environmental monitoring that can democratize sensing across the globe. Here, a brief insight into the materials and basics of sensors (methods of transduction, molecular recognition, and amplification) is provided followed by a comprehensive and critical overview of the disposable sensors currently used for medical diagnostics, food, and environmental analysis. Finally, views on how the field of disposable sensing devices will continue its evolution are discussed, including the future trends, challenges, and opportunities.

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“…Recently in 2017, an improved design for a handheld smartphone-based spectrometer that works in both absorption and emission modes is proposed by de Oliveira et al [71]. The device, named Spectrophone, comprises an embedded light source designed for absorption mode, a DVD for the diffraction grating, and a smartphone to process the image data acquired.…”

Section: Biosensors or Devicesmentioning

confidence: 99%

Smartphone as a Portable Detector, Analytical Device, or Instrument Interface

Bueno¹,

Marty²,

MuñozGuerrero³

2017

Smartphones From an Applied Research Perspective

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The Encyclopedia Britannia defines a smartphone as a mobile telephone with a display screen, at the same time serves as a pocket watch, calendar, addresses book and calculator and uses its own operating system (OS). A smartphone is considered as a mobile telephone integrated to a handheld computer. As the market matured, solid-state computer memory and integrated circuits became less expensive over the following decade, smartphone became more computer-like, and more more-advanced services, and became ubiquitous with the introduction of mobile phone networks. The communication takes place for sending and receiving photographs, music, video clips, e-mails and more. The growing capabilities of handheld devices and transmission protocols have enabled a growing number of applications. The integration of camera, access Wi-Fi, payments, augmented reality or the global position system (GPS) are features that have been used for science because the users of smartphone have risen all over the world. This chapter deals with the importance of one of the most common communication channels, the smartphone and how it impregnates in the science. The technological characteristics of this device make it a useful tool in social sciences, medicine, chemistry, detections of contaminants, pesticides, drugs or others, like so detection of signals or image.

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A handheld smartphone-controlled spectrophotometer based on hue to wavelength conversion for molecular absorption and emission measurements

Cited by 50 publications

References 36 publications

Smartphone Spectrometers

Smartphone Spectrometers

Disposable Sensors in Diagnostics, Food, and Environmental Monitoring

Smartphone as a Portable Detector, Analytical Device, or Instrument Interface

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