More than 100 shoppers purchased this LED soundbar at Walmart in a single 24-hour period this week as the retailer reduced the price to $29.88 down from $39.88. The onn 20-inch bluetooth 2.1 channel ...

Realizing of full-color quantum-dot LED display remains a challenge because of the poor stability of the blue quantum-dot and the immature inkjet-printing color patterning technology. Here, we develop ...

We present a portable multi-contrast microscope capable of producing bright-field, dark-field, and differential phase contrast images of thin biological specimens on a smartphone platform. The ...