NUS team offers a way to fight fake Graphene

Researchers from the National University of Singapore (NUS) have set out to tackle the issue of a lack of graphene production standards, which leads to many cases of poor quality graphene from suppliers. The team developed a systematic and reliable method for establishing the quality of graphene samples from around the world. They were able to achieve this by using a wide range of analytical techniques and tested samples from many suppliers.

Upon analyzing samples from over 60 different providers from the Americas, Asia, and Europe, the NUS team discovered that the majority contained less than 10% of what can be considered graphene flakes. The bulk of the samples was graphite powder that was not exfoliated properly.

NUS researchers design ultra-sensitive graphene-based magnetic sensor

Researchers from the National University of Singapore (NUS) have developed a hybrid magnetic sensor that is reportedly more sensitive than most commercially available sensors. This could encourage the development of smaller and cheaper sensors for areas like consumer electronics, information and communication technology and automotive, as well as applications like thermal switches, hard drives and magnetic field sensors.

The sensor is made of graphene and boron nitride, and includes layers of carrier-moving channels, each of which can be controlled by the magnetic field. The researchers characterized the sensor by testing it at various temperatures, angles of magnetic field, and with a different pairing material. Graphene-based magnetoresistance sensors hold immense promise over existing sensors due to their stable performance over temperature variation and eliminating the necessity for expensive wafers or temperature correction circuitry. Production cost for graphene is also much lower than silicon and indium antimonide.

Researcher from Singapore receives award for graphene-related research

The 2014 President's Science and Technology Awards (PSTA) have been given to eight top Singaporian scientists, as a high honor for their work.

Among these scientists was Professor Loh Kian Ping from NUS, who won the award for his breakthrough research in graphene chemistry focusing on the growth, processing and applications of diamond and graphene. He led his team to exciting discoveries in controlling the electronic properties of graphene by applying varying degrees of strain and even the use of graphene as a platform for growth of stem cells.

The National University of Singapore to launch a new 2D Materials Center

The National University of Singapore (NUS) announced it will open a new research center that will focus on 2D materials. The so-called "2D Materials Center" (2MC?) will receive $40 million USD in funding in the next 10 years from the National Research Foundation.

The NUS Graphene Research Center, which opened in 2010, will become a part of the new 2D Materials Center. The 2MC will have about 50 researchers from multiple disciplines. In addition to graphene, two other materials that will be the focus of initial research will be Phosphorene and Molybdenum disulfide (MoS2).

Graphene enables world's smallest heat engine, may power future nano robots

Researchers from the National University of Singapore created the world's first nanosized heat engine, made from nanometre-thick fluorinated graphene. Such a tiny engine may be useful in nanorobotics and nanomachines. It can also be used as a valve for microfluids.

CIF3 graphene membrane engine image

The new nano-engine is made of graphene and weakly chemisorbed ClF3 molecules. The CIF3 molecules are used as actuators. The engine uses a laser light beam as the “ignition plug” - when the CIF3 molecules are exposed to the laser (532 nm wavelength) they sublimate - which expand the volume at the interface between the graphene and the substrate it is grown on. This generates a high pressure (around 23 MPa) and creates a "dome-like blister". The expansion (and later contraction when the laser is turned off) is equivalent to the motion of a piston in an internal combustion engine. The blister size can be controlled by changing the laser power.

Versarien - Think you know graphene? Think again! Versarien - Think you know graphene? Think again!