2013 Image Contest Monthly Winners

July Winners  |   June Winners  |   May Winners  |  

July Winners

Category: Natural World

Bacterial Nanocable

Courtesy of Jie Song

The new Bacterial Nanocables have been found in Aarhus Bay last year, and then published in Nature 218 (2012) 491

Image Details

Taken by Nova NanoSEM

Category: Around the House

Larva of Asian Tiger Mosquito

Courtesy of Riccardo Antonelli

Mouthparts filter of an aquatic larva of third age of Asian Tiger mosquito (Aedes albopictus).

Image Details

Magnification: 800x
Sample: Peltier Stage
Detector: GSED
Voltage: 15.00 kV
Vacuum: ESEM
Horizontal Field Width: 373μm
WorkingDistance: 6.4mm
Spot: 4.5

Taken by Quanta SEM

Category: The Human Body

Immune Cell Communication

Courtesy of Rita Serda

Dendritic cells stimulated with adjuvant silicon microparticles interact with T cells.

Image Details

Magnification: 16,000x
Sample: immune cells
Detector: SE
Voltage: 10 keV
Horizontal Field Width: 18.9 um
WorkingDistance: 4.9 mm
Spot: 3.0

Taken by Nova NanoSEM

Category: Other Science

Torilis Arensis

Courtesy of Pat Kysar

Torilis arvensis is commonly known as Spreading Hedge Parsley. The plants grow up to 3 feet in height with tiny flowers clustered in small flat-topped umbels. T. arvensis fruit (schizocarp) measure 4-6mm and usually hold 2-4 individual seeds (mericarps). The schizocarp is covered with velco-like appendages which attach to clothing and fur allowing them to hitch a ride to new terrain. 

This sample was air dried, mounted onto an aluminum stub and sputter coated with gold.  It was viewed on a Philips XL30 TMP SEM at 20 kV in the EM Lab of the Department of Pathology and Laboratory Medicine at UCDavis. The image was colorized using Adobe PhotoShop Elements 2.0 software.

The image shows one of the seeds within the schizocarp and affords a better appreciation for their cunning hitch-hiking techniques. Note the various velco-like appendages. The more "thorny" limbs (tan) are found on the schizocarp while the blunt appendages are part of the mericarp. Pollen (yellow) can be seen on the flower surfaces (pink).

Image Details

Magnification: 400x
Sample: Torilis Arensis
Detector: SE
WorkingDistance: 30
Spot: 3

Taken by SEM

June Winners

Category: Natural World

Helichrysum italicum flower with pollens

Courtesy of Riccardo Antonelli

Helichrysum italicum flower with pollens

Image Details

Magnification: 652x
Detector: LFD
Voltage: 12.50kV
Vacuum: Low vacuum
Horizontal Field Width: 229μm
WorkingDistance: 10.4mm
Spot: 3.5

Taken by Quanta SEM

Category: Around the House

One is just not enough

Courtesy of Rita Serda

False arms (pseudopodia) arise from the human fibroblast to engulf silica microparticles.

Image Details

Magnification: 60,000
Sample: fibroblast and silica microparticles
Detector: TLD
Voltage: 7.5 keV
Horizontal Field Width: 4.77 um
WorkingDistance: 4.8 mm
Spot: 2.5

Taken by Nova NanoSEM

Category: The Human Body

Snap-Off Blade Knife

Courtesy of Joern Leuthold

This is the fracture surface of a snap-off blade after breaking off one of the segments.

Image Details

Magnification: 3000x
Detector: vCD
Voltage: 10 kV
Vacuum: 5*10^-6 mbar
Horizontal Field Width: 99.5 µm
WorkingDistance: 5.1
Spot: 3

Taken by Nova NanoSEM

Category: Other Science

Magnetic field of earth perturbed by a sun storm

Courtesy of Isidoro Ignacio Poveda Barriga

The picture was taken after the growth by CVD of silicon nanowires on a copper foil with gold on top. When I saw it I remembered the perturbation caused by sun storms on magnetic field of the earth. These nanowires will be used to manufacture anodes of ion-Li batteries.

Image Details

Magnification: 20,000x
Sample: Cu, Au, silicon nanowires
Detector: SE
Voltage: 10 kV
WorkingDistance: 5,2

Taken by SEM

May Winners

Category: Natural World

Acacia Dealbata Flower About to Open

Courtesy of Marcos Rosado

In this SEM image we can see an Acacia dealbata (yellow mimosa) flower about to open. The HFW is 4.35 mm. The image was taken with the flower in a fresh state, extracted from the tree and put onto the microscope at the moment. Also the image was taken as soon as possible to avoid high structure damage. False color applied by Photoshop.

Image Details

Magnification: 69x
Sample: Acacia dealbata (yellow mimosa) flower
Detector: SE
Voltage: 1.5 kV
Vacuum: High Vacuum
Horizontal Field Width: 4.35 mm
WorkingDistance: 15mm
Spot: 3.0

Taken by Quanta SEM

Category: Around the House

Cigarette Filter

Courtesy of Francisco Rangel

Cross-transverse view of a cigarette filter, showing cellulose acetate fibers.Research conducted by Laboratório de Tabaco e Derivados (LATAB)/Divisão de Química Analítica(DQAN)/ INSTITUTO NACIONAL DE TECNOLOGIA (INT). Smoking is a trap. Quit now!

Image Details

Magnification: 1000X
Sample: cellulose acetate fibers
Detector: Mix: SE + BSE
Voltage: 10 kV
Vacuum: 131 Pa
Horizontal Field Width: 298 μm
WorkingDistance: 15
Spot: 4.5

Taken by Quanta SEM

Category: The Human Body

Head Louse

Courtesy of Louwrens Tiedt

Lice olympics (pole vault). Head louse on two human hair.

Image Details

Magnification: 200x
Detector: SE
Voltage: 5 kV
Horizontal Field Width: 1.504 mm
WorkingDistance: 20 mm
Spot: 4

Taken by Quanta SEM

Category: Other Science

The WEB

Courtesy of Cyril GUEDJ

Grid used for sample growth and TEM observation

Image Details

Magnification: 20,000
Voltage: 10 kV

Taken by DualBeam

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