Journal: Science Advances

Article Title: Dynamic and programmable self-assembly of micro-rafts at the air-water interface

doi: 10.1126/sciadv.1602522

Figure Lengend Snippet: ( A ) Schematic showing magnet rotation speed Ω, individual micro-raft rotation speed ω, edge-to-edge distance d , and precession speed ω p . ( B ) Plots of d and ω p versus Ω for micro-rafts coated with 25-nm cobalt and 30-nm gold. Higher amplitudes create larger separations and induce capillary assembly ( d = 0) at higher critical Ω’s. The dashed line in the ω p versus Ω plot corresponds to the line ω p = Ω. The zoomed-in region shows an increase in ω p for A = 2 to 4 μm before assembling, suggesting capillary coupling near the onset of assembling. The control micro-rafts with A = 0 assemble at 2500 rpm, because no capillary repulsion exists between them. ( C ) Plots of d and ω p versus Ω for micro-rafts coated with 100-nm cobalt and 30-nm gold. The overall magnetic potential created by the permanent magnet exerts stronger attractive interactions for micro-rafts with 100-nm cobalt than for micro-rafts with 25-nm cobalt. Therefore, the onsets of assembling shift to higher Ω’s for all A ’s. ( D ) Plots of d and ω p versus Ω for micro-rafts coated with 25-nm cobalt and 30-nm gold and further functionalized by a layer of SAM of heptanethiol (HS-C7) to make the micro-raft surface hydrophobic. The general trend of surface hydrophobization is to push the onset of assembling toward lower Ω’s. ( E ) The first five images are the phase images obtained from a digital holographic microscope (DHM) for two micro-rafts of various amplitudes. All images were taken when the micro-rafts were spinning at 2500 rpm. The rightmost image is an optical microscope image showing a typical assembled structure. The arc angle θ is 30° for all micro-rafts in this figure.

Article Snippet: Laser scanning confocal microscope images were taken on the Keyence VK-X200 series.

Techniques: Control, Microscopy

Journal: Plant Physiology

Article Title: Effect of Vapor Pressure Deficit on Gas Exchange in Wild-Type and Abscisic Acid–Insensitive Plants ^{1 [OPEN]}

doi: 10.1104/pp.19.00436

Figure Lengend Snippet: Negative imprints of abaxial leaf surfaces. These are shown for wild-type (A) and abi1 (B) Populus × canescens leaves, in which abi1 leaves had functionally impaired stomata. The imprints were made in situ with Aquasil Ultra XLV Fast Set (DENTSPLY International), and images were captured with VK-X200 3D laser scanning confocal microscope (Keyence).

Article Snippet: The imprints were made in situ with Aquasil Ultra XLV Fast Set (DENTSPLY International), and images were captured with VK-X200 3D laser scanning confocal microscope (Keyence).

Techniques: In Situ, Microscopy