47.To encourage industry to replace silicon with graphene，it is necessary for graphene to provide high property at an extremely low expense.
48.While graphene flakes are roughly processed with bulk graphite，graphene sheets are carefully made on substrates like copper，germanium，or silicon carbide.
49.In the past ten years.graphene has become a hot topic among the scientific and technology groups.
50.Perforene won’t come into the market before it can be manufactured at a very low cost.
51.Despite of a much younger age than silicon，great progress has been made in graphene;and with ever increasing interest，investment and research in graphene technology,it’s probable to manufacture cost- effective graphene of high quality.
52.Graphene has been attempted to be used for plenty of noticeable applications.
53.Yet it still needs to take ten years for graphene to be used in semiconductors，which lies at the heart of the technology.
54.With today’s technology,it is still impossible to control material down at the atomic level.
55.Elias Towe pointed out that having no“band gap”，the dispensable feature of transistors，makes it more difficult to produce graphene transistors.
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