- Polycrystalline silicon solar cell. This photovoltaic cell converts light into electrical energy, and is a clean, renewable source of energy. The cell is made from a semiconducting silicon nitride wafer (blue), covered by a grid of electrodes (white), made of silver nanoparticles, which collect the electrical current generated by the wafer. Polycrystalline (multiple crystal) cells are less efficient than monocrystalline (single crystal) cells, but are far cheaper to manufacture. Imaged with light microscopy
Credit: Antonio Romero via Science Photo Library
- Luxurious, handmade wooden jigsaw puzzle presented in a smart, matching tin. A unique and delightful gift for both children and adults. This 96-piece puzzle is printed on a 2.5 mm wooden base, with a beautifully glossy, waterproof coating. Overall size 36 x 25 cm (14.2” x 9.8"). Some designs are more challenging than others – read on for our personal recommendations about the difficulty-level of each design, and please do let us know how you get on!
This puzzle design is tougher than it looks! We suggest that it’s suitable for ages 11 to adult, and should take a good couple of hours for the average adult to complete. That’s if you don’t give up first!
Ships direct from NANOVIZZ via PostNL tracked delivery service. Please allow 2-5 working days within Europe, 5-9 working days for the US and 6-12 working days for other international orders