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London: Using new nanotechnology, researchers have reproduced a colour image of Mona Lisa which is less than one pixel on an iPhone Retina display – 50 micrometres long or about 10,000 times smaller than the real Mona Lisa in the Louvre Museum in Paris.

The breakthrough revolutionises laser printing technology, allowing people to print high-resolution data and colour images of unprecedented quality and microscopic dimensions.


The new laser technology allows printing in a mind-blowing resolution of 127,000 dots per inch (DPI). In comparison, weekly or monthly magazines are normally printed in a resolution equivalent to 300 DPI.

The team from Technical University of Denmark (DTU) believe that there is considerable scope for application of the new laser printing technology.

“It will be possible to save data invisible to the naked eye. This includes serial numbers or bar codes of products and other information. The technology can also be used to combat fraud and forgery as it will be easier to determine whether the product is an original or a copy, ” explained professor Anders Kristensen from DTU Nanotech.

Printing the microscopic images requires a special nanoscale-structured surface.

The structure consists of rows with small columns with a diameter of merely 100 nanometers each.

This structured surface is then covered by 20 nanometers of aluminium.

When a laser pulse is transmitted from nanocolumn to nanocolumn, the nanocolumn is heated locally, after which it melts and is deformed.

The temperature can reach up to 1,500 degrees Celcius but only for a few nanoseconds, preventing the extreme heat from spreading.

Strong laser pulses create a drastic deformation, which gives the reflection from the nanocolumn an orange and yellow colour tone.

The new laser printing technology can also be used on a larger scale to personify products such as mobile phones with unique decorations, names, etc.

Foreign companies producing parts for cars, such as instrument panels and buttons, are already taking a keen interest in the technology as it can simplify the production.

The breakthrough in nanotechnology was detailed in the journal Nature Nanotechnology. (IANS) (image courtesy: animalnewyork.com)


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The aim of the book is to teach children that families can exist in different forms, and show them how to accept the diversity in family backgrounds.

By Siddhi Jain

Delhi-based author Pritisha Borthakur is set to release her new book, 'Puhor and Niyor's Mural of Family Stories'. The 1,404-word children's book was put together to address a new kind of societal debacle in the family system. The author says the aim is to teach children that families can exist in different forms, and show them how to accept the diversity in family backgrounds.

The author who named the book after her twin sons -- Puhor and Niyor -- is a parent who has seen and heard the tales of ridicule and discrimination suffered by many in India and beyond. She says the book is an artistic illustration for kids that details how different families can live and coexist. Whether it's children with two dads or two moms, children with a single dad or single mom, and even multiracial family units, Borthakur's book teaches love, understanding, and compassion towards unconventional families.

Beyond race, gender, color, and ethnicity which have formed the bases for discrimination since the beginning of time, this book aims to bring to light a largely ignored issue. For so long, single parents have been treated like a taboo without any attempt to understand their situations; no one really cares how or why one's marriage ended but just wants to treat single parents as villains simply for choosing happiness and loving their children.

Homosexual parents, a relatively new family system, is another form that has suffered hate and discrimination for many years. Pritisha emphasizes the need to understand that diversity in people and family is what makes the world beautiful and colourful. 'Puhor and Niyor's Mural of Family Stories' is a firm but compassionate statement against all forms of discrimination on the bases of sexual identity, gender, race, and even differences in background

four children standing on dirt during daytime 'Puhor and Niyor's Mural of Family Stories' is a firm but compassionate statement against all forms of discrimination on the bases of sexual identity, gender, race and even differences in background. | Photo by Ben Wicks on Unsplash


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