Showing posts with label micro fabrication. Show all posts
Showing posts with label micro fabrication. Show all posts

12/14/2015

A giant elephant on a groove of human fingerprint-the smallest man made object


This is a sculpture of one of the largest animals on earth in its possibly the smallest form. This microscopic elephant in this photograph has just been placed on the groove of a human fingerprint. 



Remember that elephant is the largest animal of earth on land. The fine tuned sculpture of elephant on fingerprint groove is over a tenth of a millimeter tall.


These sculptures were created using many technologies ranging from bespoke electronics and software, to quantum physics and special effects.

When art uses science-together they produce the most beautiful creation.


The structure is created using 3D printing technology and multi-photon lithography involving two-photon absorption.  Quantum physics playing a big role here. In this case, UV light is irradiated on a light-sensitive polymer, which solidifies at the place of irradiation. The photon (two) absorption occurs only at the tiny focal point-basically a tiny 3D pixel known as "Voxel". According to the description provided with the pictures, "the sculpture is then moved along fractionally by a computer controlled process and the next pixel is created. Slowly, over hours and hours the entire sculpture is assembled pixel by pixel and layer by layer". 


The sculpture was then photographed using scanning electron microscope (SEM). Using SEM at high magnification, hundreds of images of the nano sculpture were captured while a piezo stage was rotated to a precision of below one ten thousandth of a degree. This process is very detailed and takes lot of time. For example, one second of film can take up to 4 hours to film. This process is known as Nanoflight creator and was developed by Stefan Diller, Wuerzburg, Germany. 

Check out this website for details of this work. 

Also watch following videos.







The making

5/24/2013

Science is beautiful and fun: Microflower photos


In a recently published paper in Science magazine, scientists have described a simple  process for growing beautiful flower arrangements in micrometer scale. They have used a solution of barium chloride and sodium metasilicate in which a glass plate is placed. In this system, after few hours very complex micro-structure starts to grow in which two minerals barium carbonate and silicate are formed. The interaction between these two minerals effects pH of the solution and this change in pH has great role in the growth of micro-structures.  By manipulating different parameters like pH, temperature, CO2 in the air, different micro-structures can be produced. These strictures look very beautiful. Science is beautiful and fun to do and see. It requires great determination, curiosity, motivation, and hard work though. Below are some photographs of such microflowers produced by scientists from Harvard University.

















All photos from http://www.sciencemag.org/content/340/6134/832.full