X-ray microscopy developments at Sirius-LNLS: first commissioning experiments at the Carnauba beamline

Tolentino, H.; Geraldes, Renan; Moreno, Gabriel; Pinto, A C; Bueno, Cassiano S. N. C.; Kofukuda, Leonardo M.; Sotero, Anna P. S.; Neto, Antonio C. P.; Lena, Francesco R.; Wilendorf, W H; Baraldi, Giovanni Lenzi; Luiz, Sergio A. L.; Dias, Carlos Sato Baraldi; Pérez, Carlos A.; Neckel, Itamar T.; Galante, Douglas; Teixeira, Verônica C.; Hesterberg, Dean

doi:10.1117/12.2596496

Cited by 14 publications

(13 citation statements)

References 4 publications

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“…Specifically, the X-ray nanoprobe Carnauba supplied a fully coherent beam spot of 150 nm × 500 nm with an excitation energy of 9.750 keV. 31,32 Previous experiments are described in more detail in the Supporting Information.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

“…The long-term compatibility of the SANS was inferred by probing the leaf micronutrients by nano-XRF at the Sirius synchrotron light source (Brazilian Synchrotron Light Laboratory). Specifically, the X-ray nanoprobe Carnaúba supplied a fully coherent beam spot of 150 nm × 500 nm with an excitation energy of 9.750 keV. , Previous experiments are described in more detail in the Supporting Information.…”

Section: Experimental Sectionmentioning

confidence: 99%

See 1 more Smart Citation

Biocompatible Wearable Electrodes on Leaves toward the On-Site Monitoring of Water Loss from Plants

Barbosa

Freitas

Vidotto

et al. 2022

ACS Appl. Mater. Interfaces

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Impedimetric wearable sensors are a promising strategy for determining the loss of water content (LWC) from leaves because they can afford on-site and nondestructive quantification of cellular water from a single measurement. Because the water content is a key marker of leaf health, monitoring of the LWC can lend key insights into daily practice in precision agriculture, toxicity studies, and the development of agricultural inputs. Ongoing challenges with this monitoring are the on-leaf adhesion, compatibility, scalability, and reproducibility of the electrodes, especially when subjected to long-term measurements. This paper introduces a set of sensing material, technological, and data processing solutions that overwhelm such obstacles. Mass-production-suitable electrodes consisting of stand-alone Ni films obtained by well-established microfabrication methods or ecofriendly pyrolyzed paper enabled reproducible determination of the LWC from soy leaves with optimized sensibilities of 27.0 (Ni) and 17.5 kΩ %–1 (paper). The freestanding design of the Ni electrodes was further key to delivering high on-leaf adhesion and long-term compatibility. Their impedances remained unchanged under the action of wind at velocities of up to 2.00 m s–1, whereas X-ray nanoprobe fluorescence assays allowed us to confirm the Ni sensor compatibility by the monitoring of the soy leaf health in an electrode-exposed area. Both electrodes operated through direct transfer of the conductive materials on hairy soy leaves using an ordinary adhesive tape. We used a hand-held and low-power potentiostat with wireless connection to a smartphone to determine the LWC over 24 h. Impressively, a machine-learning model was able to convert the sensing responses into a simple mathematical equation that gauged the impairments on the water content at two temperatures (30 and 20 °C) with reduced root-mean-square errors (0.1% up to 0.3%). These data suggest broad applicability of the platform by enabling direct determination of the LWC from leaves even at variable temperatures. Overall, our findings may help to pave the way for translating “sense–act” technologies into practice toward the on-site and remote investigation of plant drought stress. These platforms can provide key information for aiding efficient data-driven management and guiding decision-making steps.

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Section: ■ Experimental Sectionmentioning

confidence: 99%

Section: Experimental Sectionmentioning

confidence: 99%

Biocompatible Wearable Electrodes on Leaves toward the On-Site Monitoring of Water Loss from Plants

Barbosa

Freitas

Vidotto

et al. 2022

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

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“…The grating change occurs at 720 nm for the spectral range from 300 to 1200 nm during the experiment. XRF hyperspectral mapping was recorded at the Carnauba beamline [48] with synchrotron radiation in panoramic views with a total area of 500 µm x 500 µm with 5 µm pixel size. The X-ray beam spot size is down to 500 nm x 200 nm and the measurements were performed with 9750 eV of excitation energy, with an energy resolution of ΔE/E = 10 -4 .…”

Section: Point Defects and Impurities Characterizationmentioning

confidence: 99%

High throughput investigation of an emergent and naturally abundant 2D material: Clinochlore

Oliveira

Guallichico

Policarpo

et al. 2022

Applied Surface Science

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“…Optical parameters for the complete beamline can be found elsewhere. 13,14 The optical system is a pair of elliptical mirrors in the KB geometry, where the first reflection occurs in the vertical focusing mirror (KB1) and then in the horizontal focusing mirror (KB2). Figure 1 illustrates the KB mirrors and their local coordinate systems (x 1 , y 1 , z 1 ) and (x 2 , y 2 , z 2 ).…”

Section: Beamline Simulationmentioning

confidence: 99%

Diagnostics of KB mirrors misalignments using Zernike rectangular polynomials and neural networks

Luiz

Bueno²,

Silva³

et al. 2022

Advances in X-Ray/Euv Optics and Components XVII

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The fine alignment of X-ray nano-focusing optics, such as Kirkpatrick-Baez (KB) mirrors, depends strongly on the ability to diagnose the X-ray beam at the focus position. Despite conventional diagnostics techniques (e.g. knife-edge) allowing the measurement of the beam profile with sub-micrometer resolution, they may yield poor accuracy for beams with sizes under 100 nm. With nanometer-resolution phase-recovering techniques like ptychography, information about optical aberrations can be obtained experimentally in the complex-valued wavefront. In this work, we use wave-propagation simulations with Synchrotron Radiation Workshop (SRW) to model the CARNAÚBA beamline at Sirius. The beam phase at the KB mirrors exit pupil is decomposed in terms of Zernike rectangular polynomials. The relevant degrees of freedom (DOF) of the mirrors are scanned, allowing the correlation of the Zernike coefficients with the beam profile at focus. Therefore, the aberrations are classified and quantified for each mirror’s DOF, and alignment tolerances are obtained. We find that each DOF can be described by a unique combination of only three Zernike terms. Additionally, a database with the first 15 Zernike coefficients is created by simulating random alignment states and used to train a simple fully-connected neural network. The neural network was able to determine the alignment states of unknown samples with errors below 3%. The combination of Zernike polynomials and neural networks could potentially lead to single-iteration alignment of KB mirrors using wavefront sensing techniques as a diagnostic tool.

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X-ray microscopy developments at Sirius-LNLS: first commissioning experiments at the Carnauba beamline

Cited by 14 publications

References 4 publications

Biocompatible Wearable Electrodes on Leaves toward the On-Site Monitoring of Water Loss from Plants

Biocompatible Wearable Electrodes on Leaves toward the On-Site Monitoring of Water Loss from Plants

High throughput investigation of an emergent and naturally abundant 2D material: Clinochlore

Diagnostics of KB mirrors misalignments using Zernike rectangular polynomials and neural networks

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