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HIGH PERFORMANCE TRIBOELECTRIC NANOGENERATOR AND ITS APPLICATIONS

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HIGH PERFORMANCE TRIBOELECTRIC NANOGENERATOR AND ITS APPLICATIONS ( high-performance-triboelectric-nanogenerator-and-its-applica )

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CHAPTER 5. APPLICATION OF TENG FOR HIGH VOLTAGE INSTRUMENTS 5.1 Recent Progress of TENG as Direct HV Power Sources TENG has emerged as a novel alternative of conventional HV power sources with unprecedented portability and safety. Its intrinsic characteristic of HV eliminates the need of sophisticated power converters, and thus greatly reduces the system complexity and cost. The limited charge transfer per operation cycle of TENG offers an unprecedented way of accurately controlling HV-driven processes, and provides extra safety to personnel and instruments in the meantime. One excellent example in this field is the use of TENG to generate nanoelectrospray ionization for highly sensitive nano-coulomb molecular mass spectrometry (MS),208 which not only utilizes the HV output of TENG, but also transforms the limitation of charge transfer into an advantage of unprecedented control over ion generation. As shown in Figure 50a, a discrete amount of pulsed charges from the SF TENG were supplied to a nano electrospray ionization (nanoESI) emitter and triggered highly repeatable ionization pulses with minimum sample consumption. The duration, frequency and ion polarity were all tunable via TENG actuation on-demand, and the HV (5-9 kV) of the TENG provided nanoESI with enhanced sensitivity at low concentrations, as demonstrated by the signature fragment ion (m/z 182.118) only observable in the SF-TENG-driven nanoESI MS when analyzing a cocaine solution (10 pg/ml). 133

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