Graphene smaller amplitude and higher frequency. This phenomenon, named "membrane effect", was predicted by Lifshitz in 1952. A prediction that was published in 2015 suggested a melting point of ≈4125 K. Recent and more sophisticated modelling has increased this temperature to at least 5000 K. At 6000 K (the sun's surface having an effective temperature of 5,777 K) graphene melts into an agglomeration of loosely coupled doubled bonded chains, before becoming a gas. The carbon–carbon bond length in graphene is about 0.142 nanometers. Graphene sheets stack to form graphite with an interplanar spacing of . Graphene is the strongest material ever
Just the Two of Us (Will Smith song) number six on the Hot 100 Airplay. It was also a Top 5 hit in the UK, reaching number two. "Just the Two of Us" was one of Smith's biggest solo hits. Smith originally wrote a children's book with the same title and lyrics. For his album, he performed it in rap form. Instrumentation was provided by "Sauce" from the R&B group Somethin' for the People. The song was parodied by Eminem in his infamous track "'97 Bonnie & Clyde" and by Dr. Evil in the 1999 film "". The accompanying music video features Smith playing with his son, Trey,