Embedding nanostructures within a bulk matrix is an important practicalapproach towards the electronic engineering of high performance thermoelectricsystems. For power generation applications, it ideally combines the efficiencybenefit offered by low dimensional systems along with the high power outputadvantage offered by bulk systems. In this work, we uncover a few crucialdetails about how to embed nanowires and nanoflakes in a bulk matrix so that anoverall advantage over pure bulk may be achieved. First and foremost, we pointout that a performance degradation with respect to bulk is inevitable as thenanostructure transitions to being multi moded. It is then shown that a nanoembedded system of suitable cross-section offers a power density advantage overa wide range of efficiencies at higher packing fractions, and this rangegradually narrows down to the high efficiency regime, as the packing fractionis reduced. Finally, we introduce a metric - \emph{the advantage factor}, toelucidate quantitatively, the enhancement in the power density offered vianano-embedding at a given efficiency. In the end, we explore the maximumeffective width of nano-embedding which serves as a reference in designinggenerators in the efficiency range of interest.
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