A nano‐biocomposite film with ultrahigh photoconductivity remains elusive and critical for bio‐optoelectronic applications. A uniform, well‐connected, high‐concentration nanomaterial network in the biological matrix remains challenging to achieve high photoconductivity. Wafer‐scale continuous nano‐biocomposite film without surface deformations and cracks play another major obstacle. Here we observed ultrahigh photoconductivity in DNA‐MoS2 nano‐biocomposite film by incorporating a high‐concentration, well‐percolated, and uniform MoS2 network in the ss‐DNA matrix. This was achieved by utilizing DNA‐MoS2 hydrogel formation, which resulted in crack‐free, wafer‐scale DNA‐MoS2 nano‐biocomposite films. Ultra‐high photocurrent (5.5 mA at 1 V) with a record‐high on/off ratio (1.3×106) was observed, five orders of magnitude higher than conventional biomaterials (∼101) reported so far. The incorporation of the Wely semimetal (Bismuth) as an electrical contact exhibited ultrahigh photoresponsivity (2.6×105 A/W). Such high photoconductivity in DNA‐MoS2 nano‐biocomposite could bridge the gap between biology, electronics, and optics for innovative biomedicine, bioengineering, and neuroscience applications.This article is protected by copyright. All rights reserved

中文翻译：

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DNA-MoS2 纳米生物复合材料中超高光电导性的观察

具有超高光电导性的纳米生物复合薄膜仍然难以捉摸，并且对于生物光电应用至关重要。生物基质中均匀、连接良好、高浓度的纳米材料网络对于实现高光电导率仍然具有挑战性。没有表面变形和裂纹的晶圆级连续纳米生物复合膜是另一个主要障碍。在这里，我们通过在 ss-DNA 基质中加入高浓度、渗透良好且均匀的 MoS2 网络，观察到 DNA-MoS2 纳米生物复合膜中的超高光电导性。这是通过利用 DNA-MoS2 水凝胶形成来实现的，从而形成无裂纹的晶圆级 DNA-MoS2 纳米生物复合薄膜。观察到超高光电流（5.5 mA，1 V）和创纪录的高开/关比（1.3×106），比迄今为止报道的传统生物材料（∼101）高五个数量级。加入韦利半金属（铋）作为电接触表现出超高的光响应性（2.6×105 A/W）。 DNA-MoS2 纳米生物复合材料中如此高的光电导率可以弥合生物学、电子学和光学之间的差距，用于创新生物医学、生物工程和神经科学应用。本文受版权保护。版权所有