Who is your best health doctor? Clothes to wear on the body. This is not a nightclub or a science-fiction story. Research teams from the United States and China have developed a new type of smart fiber that takes one step toward the goal of smart clothing. Nicholas Kotov, a professor at the University of Michigan, and Xu Chuanlai, a professor at Jiangnan University, reported on a new newspaper in the November 10 issue of the Nano Express newspaper on new ways to make smart fibers. His thesis has been published in advance in the magazine's online edition. In fact, electronic textiles have become a reality. However, the current electronic textile products are not flexible enough, too rigid, and covered with wires and sensors, are very troublesome to use, and are not suitable for mass production. The research team coated carbon nanotubes and electrolyte materials on cotton fibers. Carbon nanotubes are ultrafine materials made of carbon atoms at the nanometer (one millionth of a millimeter) level. Tens of thousands of carbon nanotubes are placed side-by-side to have as wide a hair. This method is simpler and cheaper than previous smart fiber manufacturing methods. Researchers will ordinary cotton into carbon nanotube solution repeatedly immersion, and then make it dry. This process does not require any additional electronic equipment. After so many times, the cotton fiber is electrically conductive. In laboratory tests, the research team connected the new electrical fiber to the battery and lit a simple light-emitting diode. Interestingly, once the carbon nanotube-adsorbed cotton fibers are dried, the carbon nanotubes can not be separated by heating or using a solvent. This shows that the added electrolyte material has played a role in ensuring the stability of the coating. In addition, the hydrophilic nature of the electrolyte material can also guarantee the comfort of wearing the fabric in the future. Xu told the "Finance" reporter Xu Xun, they developed the material with more durability and flexibility, the material is also closer to the ordinary fabric. He added that such carbon nanotube-modified fibers could be used in the biomedical, environmental and food safety fields in the future, for example, to monitor diseases and human vital signs and as biosensors to detect environmental and food safety contaminants. In addition, the team detected the presence of albumin after adding albumin antibodies to carbon nanotube-modified cotton fibers. Albumin is a key protein in the blood that is expected to be used to detect bleeding conditions in the wounded. However, the effect of carbon nanotube-modified fibers on the human body is inconclusive. In the paper, the team pointed out that although a large number of cell culture data suggest that such carbon nanotube coating is not harmful, the long-term impact on the skin needs further study