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Chinese scientists develop electrode coating to address signal loss and tissue adhesion problems in long-term brain-computer interface implantation_我的网站

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A | 据Electrek称，特斯拉多年来一直与白帽黑客密切合作，以提高其汽车软件的安全性。

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Chinese researchers have developed a multifunctional electrode coating that addresses key challenges in long-term brain-computer interface (BCI) implantation, including signal loss and tissue adhesion, bringing BCI one step closer to clinical application, the Global Times learned from the research team behind the findings on Sunday.
As an emerging field combining neuroscience and artificial intelligence (AI), BCI faces a major challenge of ensuring long-term compatibility between electrodes and brain tissue. Previous clinical trials showed that immune responses could cause implanted electrodes to retract after just three months, severely reducing signal quality and the number of available channels.
This problem stems from chronic inflammation triggered by implants, which creates insulating scar tissue around electrodes and separates them from neurons. Irreversible adhesion between electrodes and brain tissue after long-term implantation also makes device removal risky, potentially causing brain injury during follow-up surgeries.
Experiments showed that flexible neural electrodes coated with this material could operate stably in the brain for more than 300 days and could be safely removed without causing damage. This means the universal coating technology can make electrodes not only operate stably over the long term but can also be safely removed and replaced after aging, paving the way for long-term BCI applications.
Developed by the research team led by Zhang Wei at the Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, associated with Beijing Tiantan Hospital, Shanghai Institute of Microsystem and Information Technology and NeuroXess, a high-tech life science company specializing in BCI technologies, the cationic alternating peptide electrode coating preserves electrode flexibility and conductivity, while offering antibacterial, anti-protein adsorption and immune-rejection-inhibiting functions.
A 300-day animal study showed the coating's effectiveness. Bare electrodes experienced a sharp loss of recording capability after 90 days of implantation and could barely detect neuronal signals after 300 days. In contrast, coated electrodes maintained stable recording channels and consistently captured neural signals above 155 microvolts.
In terms of neural modulation, after 300 days of implantation, conventional electrodes required a current of 100 microamps to induce weak limb responses, while coated electrodes triggered clear movements with only 2 microamps, improving modulation efficiency by 50 times.
Notably, the removal tests highlighted a key advantage of the coating that electrodes no longer form irreversible bonds with brain tissue. In the experiments, the coated electrodes were removed intact, with minimal damage to the surrounding brain tissue, Zhang told the Global Times on Sunday.
。今天，该公司在黑客竞赛中提供了一个引人注目的奖励，成功入侵Model3安全系统的黑客可以获得这个奖励。特斯拉是第一家参与Pwn2own黑客攻击的汽车制造商，由Trend Micro旗下的Zero Day Initiative（ZDI）团队运营。特斯拉承诺，黑客竞赛的获胜者将获得模型3。特斯拉汽车软件公司副总裁刘大卫说：“我们的汽车在各个方面都有最高的安全标准，我们与安全研究机构的合作对我们来说是无价的。自2014年启动安全漏洞奖励计划以来，我们一直在增加与安全研究人员合作的投资，以确保所有特斯拉车主都能继续受益。我们期待着在pwn2own上的发现，以便我们能够继续改进我们的产品和我们设计固有安全系统的方式。”据知情人士透露，过去四年，特斯拉一直在维护一个安全漏洞奖励计划，公司向黑客提供了数十万美元。他们在系统中发现了漏洞。